California Numbered Exit Uniform System
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Exit numbers in the United States are assigned to
freeway junction In the field of road transport, an interchange (American English) or a grade-separated junction (British English) is a road junction that uses grade separations to allow for the movement of traffic between two or more roadways or highways, usi ...
s, and are usually numbered as exits from
freeway A controlled-access highway is a type of highway that has been designed for high-speed vehicular traffic, with all traffic flow—ingress and egress—regulated. Common English terms are freeway, motorway and expressway. Other similar terms ...
s.
Exit number An exit number is a number assigned to a road junction, usually an exit from a freeway. It is usually marked on the same sign as the destinations of the exit. In some countries, such as the United States, it is also marked on a sign in the go ...
s generally are found above the destinations and route number(s) at the exit, as well as a sign in the
gore Gore may refer to: Places Australia * Gore, Queensland * Gore Creek (New South Wales) * Gore Island (Queensland) Canada * Gore, Nova Scotia, a rural community * Gore, Quebec, a township municipality * Gore Bay, Ontario, a township on Manitouli ...
. Exit numbers typically reset at political borders such as state lines. Some major streets also use exit numbers. Freeway exits in the United States are usually numbered in two formats: distance-based and sequential.


Interstate Highways

The
Federal Highway Administration The Federal Highway Administration (FHWA) is a division of the United States Department of Transportation that specializes in highway transportation. The agency's major activities are grouped into two programs, the Federal-aid Highway Program a ...
(FHWA) generally requires exit numbers (mile-based or sequential) on the Interstate Highway System; the FHWA established that requirement in 1970. The ''
Manual on Uniform Traffic Control Devices The ''Manual on Uniform Traffic Control Devices for Streets and Highways'' (usually referred to as the ''Manual on Uniform Traffic Control Devices'', abbreviated MUTCD) is a document issued by the Federal Highway Administration (FHWA) of the Unit ...
'' (MUTCD) encouraged use of mileposts and exit numbering by 1961. The MUTCD mandated exit numbering in 1971. The FHWA granted
California California is a U.S. state, state in the Western United States, located along the West Coast of the United States, Pacific Coast. With nearly 39.2million residents across a total area of approximately , it is the List of states and territori ...
an exception due to the cost of installing and maintaining additional signage; the state was able to obtain a waiver because it had already built most of its
freeway A controlled-access highway is a type of highway that has been designed for high-speed vehicular traffic, with all traffic flow—ingress and egress—regulated. Common English terms are freeway, motorway and expressway. Other similar terms ...
s, although some freeways in Los Angeles County received junction numbers:
Interstate 10 Interstate 10 (I-10) is the southernmost cross-country highway in the American Interstate Highway System. I-10 is the fourth-longest Interstate in the United States at , following I-90, I-80, and I-40. This freeway is part of the originally pl ...
(I-10) was the only freeway in the county that had a complete set of junction numbers.
I-5 Interstate 5 (I-5) is the main north–south Interstate Highway on the West Coast of the United States, running largely parallel to the Pacific coast of the contiguous U.S. from Mexico to Canada. It travels through the states of Californi ...
,
US Route 101 U.S. Route 101, or U.S. Highway 101 (US 101), is a north–south United States Numbered Highway that runs through the states of California, Oregon, and Washington, on the West Coast of the United States. It is also known as (The Royal Roa ...
(US 101), and then State Route 11 (now I-110/SR 110) were numbered for short distances from downtown Los Angeles. Freeway connections were unnumbered, and junction numbers were only shown on plates, not on gore signs. In 2002, the Cal-NExUS program began to completely number California's junctions. The program is not well-funded, especially because of California's budget woes, so exits are only being signed with numbers when signs need to be replaced. As the efficiency of an exit numbering system for navigational purposes depends on all exits being consistently numbered, the usefulness of the system while only some exits are numbered is limited. Originally, the initial completion date for this project was set as November 2004. The deadline was then extended to 2008. However, the 2006 edition of the ''
California Manual on Uniform Traffic Control Devices The ''California Manual on Uniform Traffic Control Devices'' (abbreviated CA MUTCD) is the standard for traffic signs, road surface markings, and traffic signals in the U.S. state of California. It is developed by the California Department o ...
'' removed any sort of compliance deadline for the exit numbers. Nine states , mostly in the Northeast, and the
District of Columbia ) , image_skyline = , image_caption = Clockwise from top left: the Washington Monument and Lincoln Memorial on the National Mall, United States Capitol, Logan Circle, Jefferson Memorial, White House, Adams Morgan, ...
use sequential numbering schemes on at least one highway, although the 2009 edition of the MUTCD requires these jurisdictions to transition to distance-based numbering. Although a ten-year compliance period was proposed for the new edition of the MUTCD, a compliance date for this change was ultimately not adopted with the 2009 edition, meaning that the transition is accomplished through a systematic upgrading of existing signing and there is no specific date by which the change must be implemented. However, the FHWA has required that all federally funded routes with sequential numbering eventually be converted to mileage-based exit numbers. To that end, the FHWA has required each state that currently uses sequential exit numbering to submit a plan to eventually transition to distance-based exit numbers. Some of the states that currently have sequential numbering either have or intend to request a waiver from the Federal Highway Administration to retain their current numbering systems, while others have planned a gradual transition to mileage-based exit numbering over time as existing signage reaches the end of its serviceable life and is replaced. The mile-based requirement mandates multiple exits in the same mile to use a letter suffix in alphabetical order. This also applies to divided interchanges, where two exits are used for opposite directions of the road, for example on full cloverleaf interchanges. Older exit numbering schemes sometimes use cardinal directions (E, N, S, W, often E-W or N-S) depending on the directionality of the cross route(s), for example
I-93 Interstate 93 (I-93) is an Interstate Highway in the New England states of Massachusetts, New Hampshire, and Vermont in the United States. Spanning approximately along a north–south axis, it is one of three primary Interstate Highways ...
in New Hampshire uses exits 15E and 15W for the cloverleaf interchange with US 202 in
Concord Concord may refer to: Meaning "agreement" * Pact or treaty, frequently between nations (indicating a condition of harmony) * Harmony, in music * Agreement (linguistics), a change in the form of a word depending on grammatical features of other ...
which is signed east and west at the interchange. Many exits in the Northeastern states which currently or formerly used sequential numbering schemes had these directional abbreviations, but most have converted to A-B schemes. (, New Hampshire is the only state to have never used distance-based exits, including experimental dual exit/mile numbers/letters.) The New Jersey Turnpike mainline splits into an Eastern Spur and Western Spur between interchanges 15 and 18. Because of this, E and W suffixes are present on these spurs (15E-16E-18E and 15W-16W-18W) to differentiate the interchange and roadway. One interchange on the Eastern Spur was constructed at a later time between 15E and 16E, creating an exit 15X. The letter X was used to represent access to the Secaucus Junction rail station (in the planning stages as Secaucus Transfer, or Xfer), and to avoid an Interchange 15EA designation. Several states still maintain systems other than the MUTCD-standard mileage based systems, among these are: *
Alaska Alaska ( ; russian: Аляска, Alyaska; ale, Alax̂sxax̂; ; ems, Alas'kaaq; Yup'ik: ''Alaskaq''; tli, Anáaski) is a state located in the Western United States on the northwest extremity of North America. A semi-exclave of the U.S., ...
- Exits on freeway portions of Alaska's Interstate Highways are currently unnumbered. *
Connecticut Connecticut () is the southernmost state in the New England region of the Northeastern United States. It is bordered by Rhode Island to the east, Massachusetts to the north, New York to the west, and Long Island Sound to the south. Its cap ...
– Sequential, except for I-395. Other interstates will be converted to mile-based exit numbers by 2029. Connecticut planned to convert
I-91 Interstate 91 (I-91) is an Interstate Highway in the New England region of the United States. It provides the primary north–south thoroughfare in the western part of the region. The Interstate generally follows the course of the Connecti ...
to mileage-based exit numbering in 1974, however, ConnDOT abandoned that initiative due to objections from local businesses. *
Delaware Delaware ( ) is a state in the Mid-Atlantic region of the United States, bordering Maryland to its south and west; Pennsylvania to its north; and New Jersey and the Atlantic Ocean to its east. The state takes its name from the adjacent Del ...
– Exit numbers are sequential on
I-95 Interstate 95 (I-95) is the main north–south Interstate Highway on the East Coast of the United States, running from US Route 1 (US 1) in Miami, Florida, to the Houlton–Woodstock Border Crossing between Maine and the Canadia ...
and
I-495 Interstate 495 (I-495) is the designation for several Interstate Highways in the United States, all of which are related to Interstate 95, listed from south to north: * The Capital Beltway, a beltway around Washington, D.C., running through Virgin ...
.
I-295 Interstate 295 is the designation for several Interstate Highways in the United States: *Interstate 295 (Delaware–Pennsylvania), a bypass of Philadelphia, Pennsylvania * Interstate 295 (Florida), a beltway around central Jacksonville * Interstate ...
has no exit numbers at all, however, DelDOT has made a reference on a 2016 construction notice referring to the exit to I-495 north as exit 2. *
District of Columbia ) , image_skyline = , image_caption = Clockwise from top left: the Washington Monument and Lincoln Memorial on the National Mall, United States Capitol, Logan Circle, Jefferson Memorial, White House, Adams Morgan, ...
– Historically, the only exit numbers posted in the District consisted of sequential numbers on
I-295 Interstate 295 is the designation for several Interstate Highways in the United States: *Interstate 295 (Delaware–Pennsylvania), a bypass of Philadelphia, Pennsylvania * Interstate 295 (Florida), a beltway around central Jacksonville * Interstate ...
. The other freeways within the District of Columbia did not have exit numbers, but in 2008 the District began posting sequential numbers on I-395. , not all interchanges had received numbers. The close proximity of the interchanges on this short freeway, coupled with the lack of space for new interchanges, renders the sequential system more practical than the mileage-based. *
Maine Maine () is a state in the New England and Northeastern regions of the United States. It borders New Hampshire to the west, the Gulf of Maine to the southeast, and the Canadian provinces of New Brunswick and Quebec to the northeast and north ...
– The first nine exits on
I-295 Interstate 295 is the designation for several Interstate Highways in the United States: *Interstate 295 (Delaware–Pennsylvania), a bypass of Philadelphia, Pennsylvania * Interstate 295 (Florida), a beltway around central Jacksonville * Interstate ...
through Portland and South Portland, as well as I-395 thru Bangor and Brewer are sequentially numbered. *
Massachusetts Massachusetts (Massachusett language, Massachusett: ''Muhsachuweesut assachusett writing systems, məhswatʃəwiːsət'' English: , ), officially the Commonwealth of Massachusetts, is the most populous U.S. state, state in the New England ...
– Mileage based. I-291 and I-391 near Springfield, along with the Lowell Connector in Lowell, and Route 213 in Methuen are sequentially numbered. However, those roadways are short and have exits that are generally spaced in one-mile increments, closing matching the existing mile markers. The Lowell Connector does not have any mile markers currently posted along the roadway. *
Mississippi Mississippi () is a state in the Southeastern region of the United States, bordered to the north by Tennessee; to the east by Alabama; to the south by the Gulf of Mexico; to the southwest by Louisiana; and to the northwest by Arkansas. Miss ...
– Exits on
I-69 Interstate 69 (I-69) is an Interstate Highway in the United States currently consisting of 10 unconnected segments with an original continuous segment from Indianapolis, Indiana, northeast to the Canadian border in Port Huron, Michigan, at ...
are unnumbered. *
New Hampshire New Hampshire is a U.S. state, state in the New England region of the northeastern United States. It is bordered by Massachusetts to the south, Vermont to the west, Maine and the Gulf of Maine to the east, and the Canadian province of Quebec t ...
– All sequential. New Hampshire DOT has reportedly received permission to use federal funding to convert to mileage-based, but has yet to announce a formal plan for conversion. The New Hampshire General Court is considering legislation authorizing and directing the conversion to mile-based exit numbers, but Governor
Chris Sununu Christopher Thomas Sununu ( ; born November 5, 1974) is an American politician and engineer who has served as the 82nd governor of New Hampshire since 2017. A member of the Republican Party, Sununu was a member of the New Hampshire Executive Coun ...
has stated his opposition to eliminating New Hampshire's existing sequential exit numbering system. *
New Jersey New Jersey is a state in the Mid-Atlantic and Northeastern regions of the United States. It is bordered on the north and east by the state of New York; on the east, southeast, and south by the Atlantic Ocean; on the west by the Delaware ...
– Mileage - based with the exception of I-676,
I-278 Interstate 278 (I-278) is an auxiliary Interstate Highway in New Jersey and New York in the United States. The road runs from US Route 1/9 (US 1/9) in Linden, New Jersey, northeast to the Bruckner Interchange in the New Yor ...
, and the New Jersey Turnpike (part of which is concurrent with
I-95 Interstate 95 (I-95) is the main north–south Interstate Highway on the East Coast of the United States, running from US Route 1 (US 1) in Miami, Florida, to the Houlton–Woodstock Border Crossing between Maine and the Canadia ...
), which are sequential. * New York – Mostly sequential; exceptions include I-781 (
Fort Drum Fort Drum is a U.S. Army military reservation and a census-designated place (CDP) in Jefferson County, on the northern border of New York, United States. The population of the CDP portion of the base was 12,955 at the 2010 census. It is home ...
spur),
I-890 Interstate 890 (I-890) is a auxiliary Interstate Highway in the vicinity of Schenectady, New York, in the United States. The highway runs southeast–northwest from an interchange with the New York State Thruway ( I-90) northwest of Schene ...
in
Schenectady Schenectady () is a city in Schenectady County, New York, United States, of which it is the county seat. As of the 2020 census, the city's population of 67,047 made it the state's ninth-largest city by population. The city is in eastern New Y ...
, I-99, Hutchinson River Parkway, and
I-84 Interstate 84 may refer to: * Interstate 84 (Oregon–Utah), passing through Idaho, formerly known as Interstate 80N * Interstate 84 (Pennsylvania–Massachusetts) Interstate 84 (I-84) is an Interstate Highway in the Northeaster ...
.
I-95 Interstate 95 (I-95) is the main north–south Interstate Highway on the East Coast of the United States, running from US Route 1 (US 1) in Miami, Florida, to the Houlton–Woodstock Border Crossing between Maine and the Canadia ...
mostly uses sequential numbering, however, exit numbers in
The Bronx The Bronx () is a borough of New York City, coextensive with Bronx County, in the state of New York. It is south of Westchester County; north and east of the New York City borough of Manhattan, across the Harlem River; and north of the New Y ...
are mile-based. The mainline of the New York State Thruway utilizes a separate exit-numbering scheme separate from its Interstates; non-Thruway sections of I-87 and I-90 each use three independent (currently sequential) exit-numbering schemes. *
Pennsylvania Pennsylvania (; ( Pennsylvania Dutch: )), officially the Commonwealth of Pennsylvania, is a state spanning the Mid-Atlantic, Northeastern, Appalachian, and Great Lakes regions of the United States. It borders Delaware to its southeast, ...
– Interstates are numbered by milepost with the exception of I-579 and I-676; both are short urban freeways with no exit numbers at all. *
Rhode Island Rhode Island (, like ''road'') is a U.S. state, state in the New England region of the Northeastern United States. It is the List of U.S. states by area, smallest U.S. state by area and the List of states and territories of the United States ...
– Rhode Island experimented with dual exit/mile tabs in the 1970s. The state was denied a waiver from the FHWA to retain its sequential numbering system. The state completed renumbering all exit numbers from sequential to mile-based on November 3, 2022, with
I-95 Interstate 95 (I-95) is the main north–south Interstate Highway on the East Coast of the United States, running from US Route 1 (US 1) in Miami, Florida, to the Houlton–Woodstock Border Crossing between Maine and the Canadia ...
being the last interstate to do so. *
Texas Texas (, ; Spanish language, Spanish: ''Texas'', ''Tejas'') is a state in the South Central United States, South Central region of the United States. At 268,596 square miles (695,662 km2), and with more than 29.1 million residents in 2 ...
– Exits on completed sections of
I-69W Interstate 69W (I-69W) is a relatively short north–south Interstate Highway running through South Texas in the United States. The freeway begins northeast of the middle of World Trade International Bridge in Laredo and ends at I-35. In ...
, I-169, and I-369 are currently unnumbered. *
Vermont Vermont () is a state in the northeast New England region of the United States. Vermont is bordered by the states of Massachusetts to the south, New Hampshire to the east, and New York to the west, and the Canadian province of Quebec to ...
– Sequential, with no plans as of late 2018 to changed to mile-based. Governor
Phil Scott Philip Brian Scott (born August 4, 1958) is an American politician, businessman and stock car racer who has served as the 82nd governor of Vermont since 2017. A member of the Republican Party, he was elected governor in the 2016 general electi ...
reached an agreement with the FHWA to use a dual sequential/mile-based exit numbering system starting in 2020. Under the agreement, existing sequential numbers will be retained, and supplemental signs added to each exit sign assembly indicating the mile-based exit number. Two highways ( I-19 in Arizona and
Delaware Route 1 Delaware Route 1 (DE 1) is the longest numbered state highway in the U.S. state of Delaware. The route runs from the Maryland state line in Fenwick Island, Sussex County, where the road continues south into that state as Maryland R ...
E 1 have metric numbering, because they were constructed during the time when the US was thought to be completely converting to metric. DE 1 has used standard mileposts since 2003 when the metric-based posts were replaced, and several exit numbers (79, 83, 86, 88, 119) do not coincide with either the milemarker nor its kilometer conversion as they are offset by miles from a kilometer-based exit. I-19 currently has all exit numbers and distances in kilometers, but speed limits in miles per hour. The road has received funding for the distances to be changed back to miles, but in response to local opposition against exit number changes, the Arizona Department of Transportation had decided to spend the money on other roads instead.


Other highways

Exit numbering on non-Interstate highways is less consistent. For example, Texas, which normally uses mile-based exit numbering, uses sequential numbering on US 75 between downtown
Dallas Dallas () is the List of municipalities in Texas, third largest city in Texas and the largest city in the Dallas–Fort Worth metroplex, the List of metropolitan statistical areas, fourth-largest metropolitan area in the United States at 7.5 ...
and the
Oklahoma Oklahoma (; Choctaw language, Choctaw: ; chr, ᎣᎧᎳᎰᎹ, ''Okalahoma'' ) is a U.S. state, state in the South Central United States, South Central region of the United States, bordered by Texas on the south and west, Kansas on the nor ...
border. Similarly, the US 54 freeway from
El Paso El Paso (; "the pass") is a city in and the seat of El Paso County in the western corner of the U.S. state of Texas. The 2020 population of the city from the U.S. Census Bureau was 678,815, making it the 23rd-largest city in the U.S., the s ...
to the
New Mexico ) , population_demonym = New Mexican ( es, Neomexicano, Neomejicano, Nuevo Mexicano) , seat = Santa Fe , LargestCity = Albuquerque , LargestMetro = Tiguex , OfficialLang = None , Languages = English, Spanish ( New Mexican), Navajo, Ker ...
state line also uses sequential exit numbering. *
Alabama (We dare defend our rights) , anthem = "Alabama (state song), Alabama" , image_map = Alabama in United States.svg , seat = Montgomery, Alabama, Montgomery , LargestCity = Huntsville, Alabama, Huntsville , LargestCounty = Baldwin County, Al ...
: only on US 78 (future
I-22 I22 or I 22 may refer to: * Interstate 22 Interstate 22 (I-22) is a Interstate Highway in the US states of Mississippi and Alabama, connecting I-269 near Byhalia, Mississippi, to I-65 near Birmingham, Alabama. I-22 is also Corridor X of ...
). *
Alaska Alaska ( ; russian: Аляска, Alyaska; ale, Alax̂sxax̂; ; ems, Alas'kaaq; Yup'ik: ''Alaskaq''; tli, Anáaski) is a state located in the Western United States on the northwest extremity of North America. A semi-exclave of the U.S., ...
: the Johansen Expressway has three interchanges with sequential exit numbers. * In
Arizona Arizona ( ; nv, Hoozdo Hahoodzo ; ood, Alĭ ṣonak ) is a state in the Southwestern United States. It is the 6th largest and the 14th most populous of the 50 states. Its capital and largest city is Phoenix. Arizona is part of the Fou ...
, many of its non-Interstate freeways utilize exit numbers such as the freeway loops ( SR 101 and SR 202) around
Phoenix Phoenix most often refers to: * Phoenix (mythology), a legendary bird from ancient Greek folklore * Phoenix, Arizona, a city in the United States Phoenix may also refer to: Mythology Greek mythological figures * Phoenix (son of Amyntor), a ...
, US 60 and SR 51. * In
Arkansas Arkansas ( ) is a landlocked state in the South Central United States. It is bordered by Missouri to the north, Tennessee and Mississippi to the east, Louisiana to the south, and Texas and Oklahoma to the west. Its name is from the Osage ...
,
US 67 U.S. Route 67 is a major north–south U.S. highway which extends for 1,560 miles (2,511 km) in the Central United States. The southern terminus of the route is at the United States-Mexico border in Presidio, Texas, where it continues ...
(Future I-57),
Arkansas Highway 549 Interstate 49 (I-49) is an Interstate Highway in the state of Arkansas. There are two main sections of the highway across different sides of the state. The southern section starts at the Louisiana state line, then runs to Texarkana, at the ...
(AR 549), and US 70 on the Hot Springs bypass are the only non-Interstate freeways to have exit numbers. Currently,
I-49 Interstate 49 (I-49) is a north–south Interstate Highway that exists in multiple segments: the original portion entirely within the state of Louisiana with an additional signed portion extending from Interstate 220 (Louisiana), I-220 in S ...
from
I-40 Interstate 40 (I-40) is a major east–west Interstate Highway running through the south-central portion of the United States. At a length of , it is the third-longest Interstate Highway in the country, after I-90 and I-80. From west to ea ...
in
Alma Alma or ALMA may refer to: Arts and entertainment * ''Alma'' (film), a 2009 Spanish short animated film * ''Alma'' (Oswald de Andrade novel), 1922 * ''Alma'' (Le Clézio novel), 2017 * ''Alma'' (play), a 1996 drama by Joshua Sobol about Alma ...
to Bentonville in
northwest Arkansas Northwest Arkansas (NWA) is a metropolitan area and region in Arkansas within the Ozark Mountains. It includes four of the ten largest cities in the state: Fayetteville, Arkansas, Fayetteville, Springdale, Arkansas, Springdale, Rogers, Arkansas, ...
follows the old numbering system off its old designation I-540. The exit numbers and mileage are derived from their distance from where the Fort Smith section of I-540 begins at the Oklahoma state line. *
California California is a U.S. state, state in the Western United States, located along the West Coast of the United States, Pacific Coast. With nearly 39.2million residents across a total area of approximately , it is the List of states and territori ...
uses exit numbers on all of its non-Interstate highways statewide when they are built to freeway standards. The only notable exception is the Ojai Freeway stretch of SR 33, which remains unnumbered. However, like its Interstate Highways, the state's budget concerns have caused exits on these routes to only be signed with numbers when signs need to be replaced. *
Colorado Colorado (, other variants) is a state in the Mountain West subregion of the Western United States. It encompasses most of the Southern Rocky Mountains, as well as the northeastern portion of the Colorado Plateau and the western edge of t ...
does not use exit numbers on non-Interstate highways. The exception is
E-470 E-470 is a controlled-access toll road that traverses the eastern portion of the Denver metropolitan area in the US state of Colorado. It is the eastern half of the 470 beltway that serves Meridian, Parker, Aurora, Denver International Airpor ...
and the
Northwest Parkway The Northwest Parkway is a road that runs from U.S. Highway 36 (US 36) to the Interstate 25 (I-25)/ E-470 interchange. Both terminuses are in Broomfield, northwest of Denver. In combination with E-470 () and State Highway&n ...
, which are separate toll highways. *
Connecticut Connecticut () is the southernmost state in the New England region of the Northeastern United States. It is bordered by Rhode Island to the east, Massachusetts to the north, New York to the west, and Long Island Sound to the south. Its cap ...
uses sequential exit numbers on longer non-Interstate freeways, such as Route 2, Route 8, Route 9, Route 11, Route 25, and Route 72, and US 7, but will eventually transition to distance-based exit numbers. Exit numbers on Route 2A, Route 40, Route 184, Route 349, and unsigned SR 695 are mileage-based; these changes include the eastern end of the former
Connecticut Turnpike The Connecticut Turnpike (officially the Governor John Davis Lodge Turnpike) is a controlled-access highway and former toll road in the U.S. state of Connecticut; it is maintained by the Connecticut Department of Transportation (ConnDOT). Span ...
. Shorter freeway sections, such as the US 6 Windham Bypass, Route 20 (Bradley Airport Connector), and freeway sections of Route 17 lack exit numbers. Exit numbers on Route 15 ( Merritt and Wilbur Cross parkways) are sequential, Route 15's exit numbers were originally a continuation of exit numbers from the
Hutchinson River Parkway The Hutchinson River Parkway (known colloquially as The Hutch) is a north–south parkway in southern New York in the United States. It extends for from the massive Bruckner Interchange in the Throggs Neck section of the Bronx to the New York ...
in New York. However, New York has since added additional exits on the Hutchinson River Parkway, so that now the Route 120A interchange on the state line is exit 30 eastbound (Hutchinson), and exit 27 westbound (Merritt). The Wilbur Cross Parkway, eastbound, takes over the Merritt's sequential numbering. Freeway sections of US 7 also use sequential numbering. Route 72 is scheduled to have its exit numbers changed to mile-based in 2020, followed by Route 9 in 2021, and Route 8 and Route 25 starting in 2022. * In
Delaware Delaware ( ) is a state in the Mid-Atlantic region of the United States, bordering Maryland to its south and west; Pennsylvania to its north; and New Jersey and the Atlantic Ocean to its east. The state takes its name from the adjacent Del ...
, US 301 uses mileage-based exit numbers and DE 141 uses sequential exit numbers. DE 1 uses kilometer-based exit numbers despite using milemarkers since 2003 (and newer exits use numbers making no sense to either system, such as exit 86 in Frederica not being 86 miles or kilometers from the Maryland line). * In
Florida Florida is a state located in the Southeastern region of the United States. Florida is bordered to the west by the Gulf of Mexico, to the northwest by Alabama, to the north by Georgia, to the east by the Bahamas and Atlantic Ocean, and to ...
, the
Turnpike Turnpike often refers to: * A type of gate, another word for a turnstile * In the United States, a toll road Turnpike may also refer to: Roads United Kingdom * A turnpike road, a principal road maintained by a turnpike trust, a body with powers ...
and other expressways owned and operated by the Florida's Turnpike Enterprise use distance-number exits. Toll roads under the
Central Florida Expressway Authority The Central Florida Expressway Authority (CFX) is a highway authority responsible for construction, maintenance and operation of toll roads in six counties of Greater Orlando (Lake, Orange, Osceola, Polk, Seminole, and Brevard Counties). It was ...
also use distance-number exits. The
Lee Roy Selmon Expressway The Lee Roy Selmon Expressway is a all-electronic, limited access toll road in Hillsborough County, Florida, It connects the South Tampa neighborhood near MacDill Air Force Base with Downtown Tampa and the bedroom community of Brandon. The ex ...
in Tampa uses a sequential-based exit numbering system. Expressways under the authority of the
Miami-Dade Expressway Authority The Miami-Dade Expressway Authority (MDX) is an independent agency created in December 1994 by the State of Florida and the Miami-Dade County Commission. Since 1997 MDX has operated and maintained five expressways formerly operated by the Florida D ...
have no exit numbers. *
Georgia Georgia most commonly refers to: * Georgia (country), a country in the Caucasus region of Eurasia * Georgia (U.S. state), a state in the Southeast United States Georgia may also refer to: Places Historical states and entities * Related to the ...
does not carry exit numbers on non-Interstate expressways except for SR 400 and
Stone Mountain Freeway Stone Mountain Freeway is a freeway in the north-central part of the U.S. state of Georgia. It connects Interstate 285 (I-285) east of Atlanta, with the suburbs of Stone Mountain and Snellville before transitioning into an arterial road that co ...
, which run on a sequential system, and SR 10 Loop, running on a distance-number system. * The state of
Illinois Illinois ( ) is a U.S. state, state in the Midwestern United States, Midwestern United States. Its largest metropolitan areas include the Chicago metropolitan area, and the Metro East section, of Greater St. Louis. Other smaller metropolita ...
uses exit numbers on two freeways, on
Illinois Route 6 Illinois Route 6 is a 4-lane freeway entirely in Peoria County in central Illinois. It begins as a northern extension of Interstate 474 at Interstate 74 west of Peoria, and ends at Illinois Route 29 at the 9th Mile in Mossville, south of Chill ...
(IL 6) between in Peoria and IL 255 in the suburbs of St. Louis. * The state of
Indiana Indiana () is a U.S. state in the Midwestern United States. It is the 38th-largest by area and the 17th-most populous of the 50 States. Its capital and largest city is Indianapolis. Indiana was admitted to the United States as the 19th s ...
uses exit numbers on two highways with freeway segments, on US 31 between Indianapolis and South Bend and SR 912 in northwest Indiana. * The state of
Iowa Iowa () is a state in the Midwestern region of the United States, bordered by the Mississippi River to the east and the Missouri River and Big Sioux River to the west. It is bordered by six states: Wisconsin to the northeast, Illinois to the ...
uses exit numbers on non-Interstate expressways, such as
Iowa 163 Iowa Highway 163 (Iowa 163) is a state highway that travels from U.S. Highway 69 in Des Moines to US 63 near Oskaloosa. The Iowa Department of Transportation (Iowa DOT) has signed Iowa 163 from Oskaloosa to Burlington along US 63 and US ...
or the non-Interstate portions of the
Avenue of the Saints The Avenue of the Saints is a highway in the Midwestern United States that connects St. Louis, Missouri and St. Paul, Minnesota. Route description Missouri The southern end of the Avenue of the Saints is at exit 28A of Interstate 64 (I‑64) ...
. *
Kentucky Kentucky ( , ), officially the Commonwealth of Kentucky, is a state in the Southeastern region of the United States and one of the states of the Upper South. It borders Illinois, Indiana, and Ohio to the north; West Virginia and Virginia to ...
does not limit exit numbers to Interstate Highways. ** Exits on the controlled-access portion of
New Circle Road New Circle Road, also known as Kentucky Route 4, is a Kentucky state highway that serves as an inner beltway around Lexington, which is part of the consolidated city-county government with Fayette County. The state designates the start and fin ...
(KY 4), which surrounds the urban core of Lexington, are numbered on the standard distance-based system. Numbering increases in clockwise order, starting and finishing at the interchange with Nicholasville Road ( US 27) near New Circle's southernmost point. ** All roads within the state's parkway system of former toll roads (some of which have been converted to Interstates, with others in the process of conversion) use the same distance-based numbering system used on interstates. *** One exception is the Plano Road (KY 622) exit of the William Natcher Parkway (KY 9007) outside of Bowling Green. Originally the William Natcher Parkway connected I-65 at exit 20 to US 60 in Owensboro. In 2011, the Natcher Parkway was extended to terminate at Scottsville Road (US 231). This caused a renumbering of the Natcher Parkway and adding the Plano Road exit as exit 1. However, in 2019 the Natcher Parkway was upgraded to Interstate standards and redesignated as I-165. According to Interstate regulations, Interstates and Interstate spurs should not terminate at a traffic signal. This redefined the highway to once again begin at the I-65 interchange. The remaining of the highway remained as KY 9007. This left the question on how to number the Plano Road exit located approximately halfway along the remaining highway. To prevent confusion in directionality and numbering conventions, the Plano Road exit was renumbered with the rare exit 0 designation. ** In addition to these instances, several smaller cities, mainly in the southeastern and south-central portions of the Commonwealth, mark traffic lights on a main commercial road with sequential numbers, usually beginning at an intersection with a primary highway: *** BereaKY 21, starting at the
I-75 Interstate 75 (I-75) is a major north–south Interstate Highway in the Great Lakes and Southeastern regions of the United States. As with most Interstates that end in 5, it is a major cross-country, north–south route, traveling from St ...
interchange until KY 21 meets US 25. Numbering continues on US 25 until the road leaves the city limits. Throughout this stretch, numbering increases as one travels north. ***
Corbin Corbin may refer to: People * Corbin (given name) * Corbin (surname) * Corbin (musician), American singer Buildings * Corbin Building, a historic building located at 192 Broadway in New York, US * Corbin Cabin, a log structure in Shenandoah ...
US 25E, starting at the I-75 interchange at North Corbin and continuing for approximately until its intersection with KY 830 east of Corbin. Numbering increases as one travels east (which is signed as south on US 25E). ***
London London is the capital and largest city of England and the United Kingdom, with a population of just under 9 million. It stands on the River Thames in south-east England at the head of a estuary down to the North Sea, and has been a majo ...
has two sets of numbered lights. The
Hal Rogers Parkway The Hal Rogers Parkway, formerly named the Daniel Boone Parkway, connects Somerset and Hazard in southeastern Kentucky. This toll road opened in November 1971, and the tolls were removed June 1, 2003. The original extent of the highway was t ...
, starting at KY 192 (which is not numbered, as it is a flashing yellow light for parkway traffic instead of a fully controlled signal) and ending at US 25, uses increasing westbound numbering. KY 192, starting at the I-75 interchange, uses increasing eastbound numbering until the Hal Rogers Parkway. ***
Manchester Manchester () is a city in Greater Manchester, England. It had a population of 552,000 in 2021. It is bordered by the Cheshire Plain to the south, the Pennines to the north and east, and the neighbouring city of Salford to the west. The t ...
US 421, starting at the Hal Rogers Parkway and increasing as one travels north through the city. *** MiddlesboroKY 74 through the downtown area, with numbering increasing as one travels west. ***
Monticello Monticello ( ) was the primary plantation of Founding Father Thomas Jefferson, the third president of the United States, who began designing Monticello after inheriting land from his father at age 26. Located just outside Charlottesville, V ...
KY 90, starting at the northern end of the city and increasing until exiting the city. *** RadcliffUS 31W, also known as
Dixie Highway Dixie Highway was a United States auto trail first planned in 1914 to connect the Midwest with the South. It was part of a system and was expanded from an earlier Miami to Montreal highway. The final system is better understood as a network of ...
, starting at an intersection at the city's border with Elizabethtown and increasing as one travels north until reaching the main entrance to
Fort Knox Fort Knox is a United States Army installation in Kentucky, south of Louisville and north of Elizabethtown. It is adjacent to the United States Bullion Depository, which is used to house a large portion of the United States' official gold res ...
. ***
Richmond Richmond most often refers to: * Richmond, Virginia, the capital of Virginia, United States * Richmond, London, a part of London * Richmond, North Yorkshire, a town in England * Richmond, British Columbia, a city in Canada * Richmond, California, ...
also has two sets of numbered lights. US 25 Business uses exit numbers through downtown numbers lights 1–6 from
KY 52 Kentucky Route 52 (KY 52) is a long east–west state highway in Kentucky, United States, managed by the Kentucky Transportation Cabinet. Its western terminus is at US 62 near Boston, Kentucky. It goes through Nelson, LaRue, Marion, Boyl ...
at Lancaster Avenue and the next five consecutive lights south; however, the lights south of the railroad tracks and north of the KY 52 concurrency are not numbered. The bypass route wrapping east around Richmond uses exit numbers from KY 876 (locally known as Eastern Bypass) east of
I-75 Interstate 75 (I-75) is a major north–south Interstate Highway in the Great Lakes and Southeastern regions of the United States. As with most Interstates that end in 5, it is a major cross-country, north–south route, traveling from St ...
exit 87, and continues onto Dr. Robert R. Martin Highway US 25/ US 421 to I-75 exit 90; however, the traffic lights at the Interstate are not numbered. ***
Somerset ( en, All The People of Somerset) , locator_map = , coordinates = , region = South West England , established_date = Ancient , established_by = , preceded_by = , origin = , lord_lieutenant_office =Lord Lieutenant of Somerset , lord_ ...
US 27, starting at the northern limits of the city and increasing as one travels south. The numbering continues even after the road leaves the city limits, with the final numbered intersection occurring shortly before US 27 enters the city of Burnside. *
Maine Maine () is a state in the New England and Northeastern regions of the United States. It borders New Hampshire to the west, the Gulf of Maine to the southeast, and the Canadian provinces of New Brunswick and Quebec to the northeast and north ...
has exit numbers only on Interstates; its other limited-access highways with limited exceptions lack mile markers. * In
Maryland Maryland ( ) is a state in the Mid-Atlantic region of the United States. It shares borders with Virginia, West Virginia, and the District of Columbia to its south and west; Pennsylvania to its north; and Delaware and the Atlantic Ocean to ...
, there are three state highways that use exit numbers.
Maryland Route 200 Maryland Route 200 (MD 200), also known as the Intercounty Connector or ICC, is an , six-lane toll road in the U.S. state of Maryland. A controlled-access highway, it connects Gaithersburg in Montgomery County and Laurel in Prince George's Co ...
(MD 200) continues the distance-based exits from its parent I-370. MD 32 has a peculiar distance-based exit set up in that the exits are numbered from east to west from I-97 to MD 108 so that the eastern terminus of MD 32 starts at mile 0. MD 100 uses distance-based exits until Edwin Raynor Boulevard (exit 20). *
Minnesota Minnesota () is a state in the upper midwestern region of the United States. It is the 12th largest U.S. state in area and the 22nd most populous, with over 5.75 million residents. Minnesota is home to western prairies, now given over to ...
distance-numbers its exits on Interstates, but left other freeways or expressways with unnumbered exits. The first exception was U.S. Route 52 in Minnesota US 52's freeway portion through
Rochester Rochester may refer to: Places Australia * Rochester, Victoria Canada * Rochester, Alberta United Kingdom *Rochester, Kent ** City of Rochester-upon-Medway (1982–1998), district council area ** History of Rochester, Kent ** HM Prison ...
, which received mileage-based exit numbers in 2004 as part of a major widening project. In 2016, MnDOT started adding exit numbers to previously unnumbered exits during sign replacement projects or new freeway construction, starting with US 169 in
Shakopee Shakopee ( ) is a city in and the county seat of Scott County, Minnesota, United States. It is located southwest of Minneapolis. Sited on the south bank bend of the Minnesota River, Shakopee and nearby suburbs comprise the southwest portion of ...
. , portions of MN 62, MN 610, US 12, US 61, portions of US 52 north of Rochester, and most left exits, have gained numbers. * In
Mississippi Mississippi () is a state in the Southeastern region of the United States, bordered to the north by Tennessee; to the east by Alabama; to the south by the Gulf of Mexico; to the southwest by Louisiana; and to the northwest by Arkansas. Miss ...
, exits on non-Interstate freeways are not currently numbered. * In
Missouri Missouri is a U.S. state, state in the Midwestern United States, Midwestern region of the United States. Ranking List of U.S. states and territories by area, 21st in land area, it is bordered by eight states (tied for the most with Tennessee ...
, non-Interstate Highways do not have exit numbers, the exceptions being Route 364 and Route 370 in St. Charles and
St. Louis St. Louis () is the second-largest city in Missouri, United States. It sits near the confluence of the Mississippi and the Missouri Rivers. In 2020, the city proper had a population of 301,578, while the bi-state metropolitan area, which e ...
counties, which use mile-based exit numbers. * In
New England New England is a region comprising six states in the Northeastern United States: Connecticut, Maine, Massachusetts, New Hampshire, Rhode Island, and Vermont. It is bordered by the state of New York to the west and by the Canadian provinces ...
, except for
Maine Maine () is a state in the New England and Northeastern regions of the United States. It borders New Hampshire to the west, the Gulf of Maine to the southeast, and the Canadian provinces of New Brunswick and Quebec to the northeast and north ...
(which assigned exit numbers based on mileage), exit numbers are posted on express highways of any significant length, regardless of designation. Some at-grade intersections have posted numbers; such as on Route 9 in Middletown, Connecticut. *
New Hampshire New Hampshire is a U.S. state, state in the New England region of the northeastern United States. It is bordered by Massachusetts to the south, Vermont to the west, Maine and the Gulf of Maine to the east, and the Canadian province of Quebec t ...
does not assign numbers to exits to junctions with Interstates (with the exception of
I-393 Interstate 393 (I-393) is a east–west auxiliary Interstate Highway extending from I-93 at Concord to Pembroke, New Hampshire. The primary purpose of the road is to bypass a densely built commercial strip on New Hampshire Route 9 (NH&nb ...
in
Concord Concord may refer to: Meaning "agreement" * Pact or treaty, frequently between nations (indicating a condition of harmony) * Harmony, in music * Agreement (linguistics), a change in the form of a word depending on grammatical features of other ...
, in which exit 15W from
I-93 Interstate 93 (I-93) is an Interstate Highway in the New England states of Massachusetts, New Hampshire, and Vermont in the United States. Spanning approximately along a north–south axis, it is one of three primary Interstate Highways ...
connected to the US 4/ US 202 interchange prior to the construction of I-393). For example,
I-293 Interstate 293 (I-293) is an auxiliary Interstate Highway surrounding Manchester, New Hampshire, roughly shaped like two sides of a triangle. Completing the loop in the northeast (the third side of the triangle) is I-93. The southern porti ...
's southern exit from
I-93 Interstate 93 (I-93) is an Interstate Highway in the New England states of Massachusetts, New Hampshire, and Vermont in the United States. Spanning approximately along a north–south axis, it is one of three primary Interstate Highways ...
is between exits 5 and 6, but is not numbered, NH-101 eastbound, however, despite being an interstate grade freeway, is assigned Exit 7. NH 101's own exit to
I-95 Interstate 95 (I-95) is the main north–south Interstate Highway on the East Coast of the United States, running from US Route 1 (US 1) in Miami, Florida, to the Houlton–Woodstock Border Crossing between Maine and the Canadia ...
in
Hampton Hampton may refer to: Places Australia *Hampton bioregion, an IBRA biogeographic region in Western Australia *Hampton, New South Wales *Hampton, Queensland, a town in the Toowoomba Region * Hampton, Victoria Canada * Hampton, New Brunswick *Ha ...
is between exits 12 and 13, but is also not numbered. *In
New Jersey New Jersey is a state in the Mid-Atlantic and Northeastern regions of the United States. It is bordered on the north and east by the state of New York; on the east, southeast, and south by the Atlantic Ocean; on the west by the Delaware ...
, the New Jersey Turnpike and
Palisades Interstate Parkway The Palisades Interstate Parkway (PIP) is a limited-access highway in the U.S. states of New Jersey and New York. The parkway is a major commuter route into New York City from Rockland and Orange counties in New York and Bergen County in New ...
are numbered sequentially. All other highways are mile-based, except for the Brigantine Connector in
Atlantic City Atlantic City, often known by its initials A.C., is a coastal resort city in Atlantic County, New Jersey, United States. The city is known for its casinos, Boardwalk (entertainment district), boardwalk, and beaches. In 2020 United States censu ...
, which uses letters for exits. Many New Jersey freeways lack exit numbers. * In
New Mexico ) , population_demonym = New Mexican ( es, Neomexicano, Neomejicano, Nuevo Mexicano) , seat = Santa Fe , LargestCity = Albuquerque , LargestMetro = Tiguex , OfficialLang = None , Languages = English, Spanish ( New Mexican), Navajo, Ker ...
, US 84/ US 285 between
Pojoaque Pojoaque (; Tewa: Pʼohsųwæ̨geh Ówîngeh/P'osuwaege Owingeh ’òhsũ̀wæ̃̀gè ʔówîŋgè, Po’su wae geh, which translates to “water gathering place”, is a census-designated place (CDP) in Santa Fe County, New Mexico, United States. ...
and Santa Fe was the first non-Interstate highway in the state to use exit numbers when that stretch was upgraded to freeway standards in the mid-2000s. The NM 599 has two (mile-based) numbered interchanges: at Jaguar Drive (exit 2) and at County Road 62 (exit 6). The US 70/US 285 Relief Route around Roswell has an interchange with two exits marked exit A and exit B. Other freeways (US 70 east of Las Cruces and NM 423 in Albuquerque) have no exit numbers due to their relatively short lengths. Previously, New Mexico did not assign exit numbers on non-Interstate highways. * In New York, most highways in the New York City metro region of this type use sequential numbering (an exception is the Belt Parkway system, which uses directional suffixes (N, S, E, W) and alphabetical suffixes). Expressways and freeways without Interstate designations upstate have unnumbered interchanges. In addition: ** All parkways on
Long Island Long Island is a densely populated island in the southeastern region of the U.S. state of New York (state), New York, part of the New York metropolitan area. With over 8 million people, Long Island is the most populous island in the United Sta ...
, except the
Southern State Parkway The Southern State Parkway (also known as the Southern State or Southern Parkway; abbreviated as SO on signage) is a limited-access highway on Long Island, New York, in the United States. The parkway begins at an interchange with the Belt and C ...
,
Heckscher State Parkway The Heckscher State Parkway (formerly known as the Heckscher Spur) is an parkway on Long Island, New York, in the United States. The parkway is located entirely within the Suffolk County town of Islip. Although it officially begins at the ...
, and
Northern State Parkway The Northern State Parkway (also known as the Northern Parkway or Northern State) is a limited-access state parkway on Long Island in the U.S. state of New York. The western terminus is at the Queens– Nassau County line, where the parkway conti ...
preface exit numbers with a one- or two-letter prefix indicating the parkway's name. For example, exits on the
Meadowbrook Parkway The Meadowbrook State Parkway (also known as the Meadowbrook, the Meadowbrook Parkway or the MSP) is a parkway in Nassau County, New York, in the United States. Its southern terminus is at a full cloverleaf interchange with the Bay and Ocean par ...
are numbered M1 through M10, and exits on the Sunken Meadow Parkway are numbered SM1 through SM5. Some of these exits have a letter suffix as well (usually N, S, E, and/or W). ** Some at-grade intersections (level junctions) have posted numbers; former examples are the
Taconic State Parkway The Taconic State Parkway (often called the Taconic or the TSP and known administratively as New York State Route 987G or NY 987G) is a parkway between Kensico Dam and Chatham, the longest in the U.S. state of New York. It follows ...
,
NY 17 New York State Route 17 (NY 17) is a major state highway that extends for through the Southern Tier and Downstate regions of New York in the United States. It begins at the Pennsylvania state line in Mina and follows the Southern T ...
, and within
New York City New York, often called New York City or NYC, is the List of United States cities by population, most populous city in the United States. With a 2020 population of 8,804,190 distributed over , New York City is also the L ...
,
NY 27 New York State Route 27 (NY 27) is a long state highway that runs east–west from Interstate 278 (I-278) in the New York City borough of Brooklyn to Montauk Point State Park on Long Island, New York. Its two most prominent comp ...
along only the section of
Linden Boulevard Linden Boulevard is a boulevard in New York City. It starts off at Flatbush Avenue in Brooklyn as a one-way street to Caton Avenue, where it becomes a two-way boulevard, and stretches through both Brooklyn and Queens. This boulevard, esp ...
east of Kings Highway. Current examples are the Bronx River Parkway and, within New York City, NY 27 along
Conduit Avenue Conduit Avenue (Conduit Boulevard in Brooklyn) is an arterial road in New York City, the vast majority of which is in Queens. The divided highway runs from Atlantic Avenue in Cypress Hills, Brooklyn to Hook Creek Boulevard in Rosedale, Quee ...
only. ** The
Taconic State Parkway The Taconic State Parkway (often called the Taconic or the TSP and known administratively as New York State Route 987G or NY 987G) is a parkway between Kensico Dam and Chatham, the longest in the U.S. state of New York. It follows ...
formerly numbered exits and at-grade intersections sequentially by county, with a one-letter prefix indicating the county. Interchanges in
Westchester County Westchester County is located in the U.S. state of New York. It is the seventh most populous county in the State of New York and the most populous north of New York City. According to the 2020 United States Census, the county had a population ...
were prefixed with W (e.g., W5), Putnam with P, Dutchess with D, and Columbia with C. The Taconic Parkway received mile-based exit numbers in the summer of 2017 as part of an ongoing sign replacement project. ** Exits on the Berkshire Spur (part of which is I-90) of the
New York Thruway {{Infobox road , state = NY , type = NYST , alternate_name = Governor Thomas E. Dewey Thruway , maint = NYSTA , map = {{maplink, frame=yes, plain=yes, frame-align=center, frame-width=290, type=line, stroke-width=2, type2=line, from2=New Yor ...
are B1, B2, and B3, as the spur is part of the mainline ticket system. (Exits 1, 2, and 3 on the mainline Thruway are in Yonkers). * In
North Carolina North Carolina () is a state in the Southeastern region of the United States. The state is the 28th largest and 9th-most populous of the United States. It is bordered by Virginia to the north, the Atlantic Ocean to the east, Georgia and So ...
, uses mileage-based exit numbers on all freeways. Additionally, exit numbers are often assigned to major grade-separated interchanges, even if the road is not a freeway, such as the interchange between the boulevard-grade US 70 and I-540 in
Wake County Wake County is located in the U.S. state of North Carolina. In the 2020 census, its population was 1,129,410, making it North Carolina's most-populous county. From July 2005 to July 2006, Wake County was the 9th-fastest growing county in the U ...
. *
Oklahoma Oklahoma (; Choctaw language, Choctaw: ; chr, ᎣᎧᎳᎰᎹ, ''Okalahoma'' ) is a U.S. state, state in the South Central United States, South Central region of the United States, bordered by Texas on the south and west, Kansas on the nor ...
posts exit numbers on its turnpike system. *
Oregon Oregon () is a U.S. state, state in the Pacific Northwest region of the Western United States. The Columbia River delineates much of Oregon's northern boundary with Washington (state), Washington, while the Snake River delineates much of it ...
originally did not post exit numbers on any of its non-Interstates. In the 1990s, the
Oregon Department of Transportation The Oregon Department of Transportation (ODOT) is a department of the state government of the U.S. state of Oregon responsible for systems of transportation. It was first established in 1969. It had been preceded by the Oregon State Highway Depar ...
began numbering most sections of its freeways with mile-based exits, starting with US 26 and
OR 217 Oregon Route 217 is an Oregon state highway which serves the western suburbs of Portland. OR 217 is a controlled-access highway which connects U.S. Route 26 with Interstate 5. OR 217 consists of the Beaverton-Tigard Highway 144 (see Oregon ...
west of
Portland Portland most commonly refers to: * Portland, Oregon, the largest city in the state of Oregon, in the Pacific Northwest region of the United States * Portland, Maine, the largest city in the state of Maine, in the New England region of the northeas ...
. , almost all Oregon freeway interchanges are numbered; new interchanges are also numbered. (These exits are based on internal
limited-access road A limited-access road, known by various terms worldwide, including limited-access highway, dual-carriageway, expressway, limited access freeway, and partial controlled access highway, is a highway or arterial road for high-speed traffic which ...
mileage; see
State highways in Oregon The state highway system of the U.S. state of Oregon is a network of highways that are owned and maintained by the Highway Division of the Oregon Department of Transportation (ODOT). Highways and routes The state highway system consists of abo ...
for an explanation on these differences.) *
Pennsylvania Pennsylvania (; ( Pennsylvania Dutch: )), officially the Commonwealth of Pennsylvania, is a state spanning the Mid-Atlantic, Northeastern, Appalachian, and Great Lakes regions of the United States. It borders Delaware to its southeast, ...
's non-Interstate highways that have numbered exits are still numbered sequentially (such as the freeway portion of PA 28 between Pittsburgh and Kittanning) with the exception of the toll roads that are part of the
Pennsylvania Turnpike The Pennsylvania Turnpike (Penna Turnpike or PA Turnpike) is a toll highway operated by the Pennsylvania Turnpike Commission (PTC) in the U.S. state of Pennsylvania. A controlled-access highway, it runs for across the state. The turnpike's w ...
system. PA 60 was one of these roads, but the numbers were converted to the mileage-based system (since reversed) in November 2009 when I-376 replaced PA 60 to Mercer County. The
Lehigh Valley Thruway U.S. Route 22 (US 22) is an east–west U.S. highway that stretches from Cincinnati, Ohio, in the west to Newark, New Jersey, in the east. In Pennsylvania, the route runs for between the West Virginia state line in Washington County, whe ...
(US 22) through Bethlehem and US 30 between York and Lancaster have no exit numbering, but do have mileposts that reflect the appropriate distance from the West Virginia border. Additionally, freeway sections can have independent milepost systems that apply exclusively to the freeway: an example of this being the Robert Casey Highway-US 6 extending northeast of Scranton, which has mileposts reflecting the length of the freeway section. *
Rhode Island Rhode Island (, like ''road'') is a U.S. state, state in the New England region of the Northeastern United States. It is the List of U.S. states by area, smallest U.S. state by area and the List of states and territories of the United States ...
has mile-based exit numbers on Route 99 , on Route 4, Route 78, Route 403, and the Airport Connector , on Route 146 as of summer 2019, and on Route 10, Route 24, and Route 37 . *
Tennessee Tennessee ( , ), officially the State of Tennessee, is a landlocked state in the Southeastern region of the United States. Tennessee is the 36th-largest by area and the 15th-most populous of the 50 states. It is bordered by Kentucky to th ...
generally does not post exit numbers on its non-Interstate freeways, with the exceptions of Nashville's partial beltway SR 155 (Briley Parkway) and the controlled-access segment of SR 386 (Vietnam Veterans Boulevard). *
Texas Texas (, ; Spanish language, Spanish: ''Texas'', ''Tejas'') is a state in the South Central United States, South Central region of the United States. At 268,596 square miles (695,662 km2), and with more than 29.1 million residents in 2 ...
currently has four non-interstates that use exit numbers. US 75 uses a sequential scheme. Due to a major reconstruction project in the 1990s, which combined many exits, these jump from 8B to 20B. A stretch of US 82 from Whitesboro to Honey Grove in
North Texas North Texas (also commonly called North Central Texas) is a term used primarily by residents of Dallas, Fort Worth, and surrounding areas to describe much of the north central portion of the U.S. state of Texas. Residents of the Dallas–Fort Wo ...
has exits 622 through 686. US 54 in El Paso uses sequential exits, starting at exit 20. SH 130 uses mile-based exits starting at 497 and decreases to 411 at its northern terminus. Exits on other freeways are based on a statewide reference system where the exit number is determined by the distance from either the northernmost (northwest corner of the Texas Panhandle, for north-south routes) or westernmost (Texas–New Mexico–Mexico
tripoint A tripoint, trijunction, triple point, or tri-border area is a geographical point at which the boundaries of three countries or subnational entities meet. There are 175 international tripoints as of 2020. Nearly half are situated in rivers, l ...
, near El Paso, for east-west routes) geographic reference point in Texas. *
Utah Utah ( , ) is a state in the Mountain West subregion of the Western United States. Utah is a landlocked U.S. state bordered to its east by Colorado, to its northeast by Wyoming, to its north by Idaho, to its south by Arizona, and to it ...
's higher-density freeways have exit numbers, including SR 154 (Bangerter Highway), SR 201, and SR 67 (Legacy Parkway). Ten miles of US 89 in
Davis County Davis County is or was the name of the following counties in the United States: *Davis County, Iowa, named in honor of Garrett Davis, a Congressman from Kentucky *Davis County, Utah, named for Daniel C. Davis, captain in the Mormon Battalion *Cass ...
and US 40/ US 189 between
I-80 Interstate 80 (I-80) is an east–west transcontinental freeway that crosses the United States from downtown San Francisco, California, to Teaneck, New Jersey, in the New York metropolitan area. The highway was designated in 1956 as one o ...
and SR 32 are signed with exit numbers. Also, US 6/ US 191 in
Price A price is the (usually not negative) quantity of payment or compensation given by one party to another in return for goods or services. In some situations, the price of production has a different name. If the product is a "good" in the c ...
is signed with exit numbers using US 6 mileage. *
Vermont Vermont () is a state in the northeast New England region of the United States. Vermont is bordered by the states of Massachusetts to the south, New Hampshire to the east, and New York to the west, and the Canadian province of Quebec to ...
does not use the mileage-based system on non-Interstates, although supplemental "Milepoint Exit" placards indicating the mile-based exit number are being added to existing signage, with two exceptions: VT 127 and VT 289 in the
Burlington Burlington may refer to: Places Canada Geography * Burlington, Newfoundland and Labrador * Burlington, Nova Scotia * Burlington, Ontario, the most populous city with the name "Burlington" * Burlington, Prince Edward Island * Burlington Bay, no ...
area. The numbers would have been continuous if the Chittenden County Circumferential Highway were completed. The numbers start at Manhattan Drive just north of Burlington and end at
Interstate 89 Interstate 89 (I-89) is an Interstate Highway in the New England region of the United States traveling from Bow, New Hampshire, to the Canadian border between Highgate Springs, Vermont, and Saint-Armand, Quebec. As with all odd-numbered p ...
near Williston. Freeway sections of US 4 and US 7 in the western part of the state use sequential numbering. *
Washington Washington commonly refers to: * Washington (state), United States * Washington, D.C., the capital of the United States ** A metonym for the federal government of the United States ** Washington metropolitan area, the metropolitan area centered o ...
state does not number most of its non-Interstate freeway exits. Two exceptions are SR 14 from
Vancouver Vancouver ( ) is a major city in western Canada, located in the Lower Mainland region of British Columbia. As the List of cities in British Columbia, most populous city in the province, the 2021 Canadian census recorded 662,248 people in the ...
to Camas (since the 1990s) and SR 16 from Tacoma to near
Gig Harbor Gig Harbor is the name of both a bay on Puget Sound and a city on its shore in Pierce County, Washington,. The population was 12,029 at the 2020 census. Gig Harbor is one of several cities and towns that claim to be "the gateway to the Olymp ...
(since 2006, possibly to extend along all of SR-16 to its northern terminus in Gorst), both milepost-based. It is unclear if other freeways will receive numbers in the future. *
West Virginia West Virginia is a state in the Appalachian, Mid-Atlantic and Southeastern regions of the United States.The Census Bureau and the Association of American Geographers classify West Virginia as part of the Southern United States while the B ...
has only one non-Interstate with exit numbers, the US 22 freeway in Weirton. *
Wisconsin Wisconsin () is a state in the upper Midwestern United States. Wisconsin is the 25th-largest state by total area and the 20th-most populous. It is bordered by Minnesota to the west, Iowa to the southwest, Illinois to the south, Lake M ...
has exit numbers on the freeway and expressway portions of U.S. Route 10 in Wisconsin, US 10, U.S. Route 12 in Wisconsin, US 12, Wisconsin Highway 16 (WIS 16), Wisconsin Highway 26, WIS 26, Wisconsin Highway 29, WIS 29, Wisconsin Highway 30, WIS 30, Wisconsin Highway 64, WIS 64, U.S. Route 41 in Wisconsin, US 41, U.S. Route 45 in Wisconsin, US 45, U.S. Route 51 in Wisconsin, US 51, U.S. Route 53 in Wisconsin, US 53, Wisconsin Highway WIS 145, and U.S. Route 151, US 151.


States that renumbered exits

Many states formerly used sequential numbers, and in some cases used exit numbers sparingly, if at all. The following states have introduced mile-based exit numbering on some or all of their highways: *
California California is a U.S. state, state in the Western United States, located along the West Coast of the United States, Pacific Coast. With nearly 39.2million residents across a total area of approximately , it is the List of states and territori ...
– Began widespread exit numbering in January 2002, although some exits in Los Angeles received mile-based numbers in the 1970s. California was the only state not to require exit numbers or mileposts, because most of their highway system was built prior to the enactment of the federal requirement. Before adopting exit numbering, California relied on its system of California postmile, county-based mileposts on all highways, without having explicitly numbered exits. Originally, the initial completion date for installing exit numbers statewide was set for November 2004. But because of California's budget concerns, exits (especially in the Greater Los Angeles and San Francisco Bay areas) have generally been numbered only when signs needed to be replaced. The state may eventually replace all older overhead signs (and thus add exit numbers) as part of an energy-saving measure: in 2014, ''Roads & Bridges'' reported that the California Department of Transportation was testing types of reflective sheeting to eliminate the need for electrical-sign lighting. *
Colorado Colorado (, other variants) is a state in the Mountain West subregion of the Western United States. It encompasses most of the Southern Rocky Mountains, as well as the northeastern portion of the Colorado Plateau and the western edge of t ...
– Initially sequential, used dual mile/sequential plates in the mid-1970s. *
Connecticut Connecticut () is the southernmost state in the New England region of the Northeastern United States. It is bordered by Rhode Island to the east, Massachusetts to the north, New York to the west, and Long Island Sound to the south. Its cap ...
– Started a gradual transition from sequential to mileage-based exit numbers in 2015, with SR 695 and I-395 converted that year, and Route 2A in early 2016 under the same contract. , Route 9, Connecticut Route 17, Route 17 (Middletown section), Connecticut Route 72, Route 72, Connecticut Route 82, Route 82, and SR 571 are in the process of transitioning from sequential to mile-based numbering as part of ongoing sign replacement projects. The next freeways to be converted are Connecticut Route 40, Route 40 in 2021; Connecticut Route 2, Route 2, Connecticut Route 3, Route 3, Connecticut Route 11, Route 11, and Connecticut Route 17, Route 17 (Glastonbury section) in 2022; followed by Connecticut Route 8, Route 8 and Connecticut Route 25, Route 25, also tentatively scheduled for conversion starting in 2022, and Interstate 691, I-691 planned for 2023. Two short freeways whose exits were previously unnumbered, Connecticut Route 184, Route 184 and Connecticut Route 349, Route 349 in Groton, Connecticut, Groton received mileage-based exit numbers starting in 2018 as part of a sign replacement project that includes I-95 from New London to the Rhode Island state line (this section of I-95 will retain sequential exit numbers for the time being until signs along the entire length of I-95 are updated and ready for conversion). Exit numbers on other highways will be converted to mile-based numbering by 2030 as existing highway signs reach the end of their serviceable life and are replaced with new signage. As highways are converted to mile-based exit numbers, sequential numbers will be posted on "Old Exit XX" placards on advance guide signs and gore signs for at least two years following the conversion. *
Florida Florida is a state located in the Southeastern region of the United States. Florida is bordered to the west by the Gulf of Mexico, to the northwest by Alabama, to the north by Georgia, to the east by the Bahamas and Atlantic Ocean, and to ...
– Began January 28, 2002, now complete. However, Interstate 110 (Florida), I-110 retained its sequential exit numbers. *
Georgia Georgia most commonly refers to: * Georgia (country), a country in the Caucasus region of Eurasia * Georgia (U.S. state), a state in the Southeast United States Georgia may also refer to: Places Historical states and entities * Related to the ...
– Began January 4, 2000, now complete, no former exit signs were used in the renumbering. (Interstate highways only). *
Illinois Illinois ( ) is a U.S. state, state in the Midwestern United States, Midwestern United States. Its largest metropolitan areas include the Chicago metropolitan area, and the Metro East section, of Greater St. Louis. Other smaller metropolita ...
formerly did not number exits on its original Illinois Tollways, including those overlaid with Interstate Highways. Starting with Interstate 355, I-355 (a toll road from its inception in 1989), toll roads began to be numbered according to standard mile-based exit signage. From the 1990s through the 2010s, Illinois gradually added exit numbers to its remaining toll Interstates. *
Indiana Indiana () is a U.S. state in the Midwestern United States. It is the 38th-largest by area and the 17th-most populous of the 50 States. Its capital and largest city is Indianapolis. Indiana was admitted to the United States as the 19th s ...
– Around 1980. Exits on I-69 between Indianapolis and the Michigan state line underwent a second renumbering in 2012, when the first portion of the I-69 extension to Evansville opened that year. *
Iowa Iowa () is a state in the Midwestern region of the United States, bordered by the Mississippi River to the east and the Missouri River and Big Sioux River to the west. It is bordered by six states: Wisconsin to the northeast, Illinois to the ...
– Adopted distance-based exit numbering in 1977. *
Maine Maine () is a state in the New England and Northeastern regions of the United States. It borders New Hampshire to the west, the Gulf of Maine to the southeast, and the Canadian provinces of New Brunswick and Quebec to the northeast and north ...
– May 15, 2004 (experimented with dual exit/mile tabs in the 1970s). Sequential exit numbers were retained for two years on yellow "Formerly Exit XX" placards below advance guide signs, which have since been removed. *
Maryland Maryland ( ) is a state in the Mid-Atlantic region of the United States. It shares borders with Virginia, West Virginia, and the District of Columbia to its south and west; Pennsylvania to its north; and Delaware and the Atlantic Ocean to ...
- All Interstates use mileage-based exits except for the unsigned I-595, it uses miles based on U.S. Route 50 in Maryland, US 50 starting with the
District of Columbia ) , image_skyline = , image_caption = Clockwise from top left: the Washington Monument and Lincoln Memorial on the National Mall, United States Capitol, Logan Circle, Jefferson Memorial, White House, Adams Morgan, ...
border. *
Massachusetts Massachusetts (Massachusett language, Massachusett: ''Muhsachuweesut assachusett writing systems, məhswatʃəwiːsət'' English: , ), officially the Commonwealth of Massachusetts, is the most populous U.S. state, state in the New England ...
- Completed conversion to mileage-based exit numbers in August 2021. The state had planned to start transition from sequential to mile-based exit numbers in 2016, but was halted due to local opposition from residents of Cape Cod. After being denied a waiver from the Federal Highway Administration to retain its sequential numbering, MassDOT announced in November 2019 that transition to mileage-based exit numbers would begin in 2020. There will be a transition period where the sequential exit numbers will be posted on "OLD EXIT XX" placards below advance guide signs and exit gore signs for at least 2 years. *
Mississippi Mississippi () is a state in the Southeastern region of the United States, bordered to the north by Tennessee; to the east by Alabama; to the south by the Gulf of Mexico; to the southwest by Louisiana; and to the northwest by Arkansas. Miss ...
– 1980s. *
New Jersey New Jersey is a state in the Mid-Atlantic and Northeastern regions of the United States. It is bordered on the north and east by the state of New York; on the east, southeast, and south by the Atlantic Ocean; on the west by the Delaware ...
– Around 1970. The New Jersey Turnpike kept sequential exit numbering. * New York – New Interstates (I-781 and I-99) have mileage-based exit numbers. The state has no timeline for converting its remaining highways to mileage-based numbering, although it appears that NYSDOT and NYSTA will gradually transition to mile-based exit numbers through sign replacement projects, as evidenced by a sign replacement and exit numbering contract for the
Taconic State Parkway The Taconic State Parkway (often called the Taconic or the TSP and known administratively as New York State Route 987G or NY 987G) is a parkway between Kensico Dam and Chatham, the longest in the U.S. state of New York. It follows ...
completed in 2017, and a similar contract to replace signs and renumber exits on Interstate 84 (New York), I-84 that was completed in 2019. Exit numbers on the
Hutchinson River Parkway The Hutchinson River Parkway (known colloquially as The Hutch) is a north–south parkway in southern New York in the United States. It extends for from the massive Bruckner Interchange in the Throggs Neck section of the Bronx to the New York ...
were converted from sequential to mileage-based in the summer of 2021. Bills directing the NYSDOT and the New York State Thruway Authority to renumber exits from sequential to mile-based have been introduced into the state legislature since 2008, none of which have been approved by both chambers. On routes where exit numbers are converted, "Old Exit XX" placards will be placed alongside advanced guide signs for a period of time for motorists to adjust to the new numbering system. Interstate 81 will be renumbered to distance based interchange numbers when I-81 is relocated in the Syracuse area. * North Dakota – 1980s. * Ohio – Interstate 475 (Ohio), I-475 was its first highway to receive mileage-based exit numbers, in October 1974. The Ohio Turnpike used both systems from January 1998 to September 2002. *
Pennsylvania Pennsylvania (; ( Pennsylvania Dutch: )), officially the Commonwealth of Pennsylvania, is a state spanning the Mid-Atlantic, Northeastern, Appalachian, and Great Lakes regions of the United States. It borders Delaware to its southeast, ...
– Began April 2001 on Interstates and all highways of the Pennsylvania Turnpike system. Prior to renumbering, junctions solely between two-digit interstates were not numbered (for example, the junction of Interstate 79 in Pennsylvania, I-79 and Interstate 80 in Pennsylvania, I-80). Sequential numbering skipped these junctions. Signage approaching many interchanges still includes former sequential numbers on "Old Exit XX" placards below the exit signs. Neither Interstate 579 nor Interstate 676 have exit numbers. *
Rhode Island Rhode Island (, like ''road'') is a U.S. state, state in the New England region of the Northeastern United States. It is the List of U.S. states by area, smallest U.S. state by area and the List of states and territories of the United States ...
– Transition was supposed to occur in four phases starting in 2016, with the full conversion scheduled for completion by the end of 2019. Interstate 295 was the first highway in Rhode Island to receive mile-based exit numbers, starting in November 2017. Mile-based exit numbers have been added to Rhode Island Route 146, Route 146 as part of a sign replacement project. Conversion completed in November 2022, with
I-95 Interstate 95 (I-95) is the main north–south Interstate Highway on the East Coast of the United States, running from US Route 1 (US 1) in Miami, Florida, to the Houlton–Woodstock Border Crossing between Maine and the Canadia ...
the last remaining highway in the state. *
Texas Texas (, ; Spanish language, Spanish: ''Texas'', ''Tejas'') is a state in the South Central United States, South Central region of the United States. At 268,596 square miles (695,662 km2), and with more than 29.1 million residents in 2 ...
– Late 1970s. *
Utah Utah ( , ) is a state in the Mountain West subregion of the Western United States. Utah is a landlocked U.S. state bordered to its east by Colorado, to its northeast by Wyoming, to its north by Idaho, to its south by Arizona, and to it ...
– New exit numbers were implemented for interchanges in the northern counties of Juab County, Utah, Juab, Utah County, Utah, Utah, Salt Lake County, Utah, Salt Lake, Davis County, Utah, Davis, Weber County, Utah, Weber, and Box Elder County, Utah, Box Elder due to a surveying error when I-15 was first built in Utah. The route originally curved around the west of Nephi, Utah, Nephi, but was changed to the east. The original surveyor measurements did not reflect this change, and UDOT corrected this error after GPS systems began to give wrong mileage directions. *
Vermont Vermont () is a state in the northeast New England region of the United States. Vermont is bordered by the states of Massachusetts to the south, New Hampshire to the east, and New York to the west, and the Canadian province of Quebec to ...
reached an agreement with the FHWA in 2019 to use dual sequential/mile-based exit numbers. Under the approved plan, existing sequential exit numbers will be retained for at least the next decade, but a supplemental mile-based exit number will be added to each exit sign starting in the spring 2020. The agreement stipulates that Vermont must convert to mile-based exit numbers during the next round of sign replacements, planned for some point in the 2030s. * Virginia – Early 1990s, exceptions include Virginia State Route 267, SR 267 (suburban Washington, D.C.), I-581 (Roanoke, Virginia, Roanoke), and I-664 (Newport News, Virginia, Newport News - Chesapeake, Virginia, Chesapeake). I-581 and I-664 both utilize sequential exit numbers, furthermore, exit 1 is at the highways' northern ends. Virginia did not post temporary placards indicating the former exit numbers after the conversion.


Early exit numbers

* In April 1938, the New York City Department of Parks installed exit numbers on
New York City New York, often called New York City or NYC, is the List of United States cities by population, most populous city in the United States. With a 2020 population of 8,804,190 distributed over , New York City is also the L ...
's parkways, specifically: ** Grand Central Parkway – 1 at Triborough Bridge to 11 at Kew Gardens, Queens, Kew Gardens, and on to 24 at Marcus Avenue, then continuing from 25 (Lakeville Road) on the
Northern State Parkway The Northern State Parkway (also known as the Northern Parkway or Northern State) is a limited-access state parkway on Long Island in the U.S. state of New York. The western terminus is at the Queens– Nassau County line, where the parkway conti ...
(run by the Long Island State Park Commission, which also planned numbers on its other parkways) ** Interborough Parkway (now the Jackie Robinson Parkway) – 4 at Pennsylvania Avenue (Brooklyn), Pennsylvania Avenue to 11 at Kew Gardens, Queens, Kew Gardens (exits 1, 2, and 3 were intended for a formerly proposed extension to Belt Parkway) ** Henry Hudson Parkway – 9 at 72nd Street (Manhattan), 72nd Street to 19 at Mosholu Parkway (exits 1-8 being along the West Side Highway, starting at The Battery (Manhattan), The Battery) **
Hutchinson River Parkway The Hutchinson River Parkway (known colloquially as The Hutch) is a north–south parkway in southern New York in the United States. It extends for from the massive Bruckner Interchange in the Throggs Neck section of the Bronx to the New York ...
– beginning with 7 in Pelham Bay Park * As other New York-area parkways were completed, they too received numbers. **
Connecticut Connecticut () is the southernmost state in the New England region of the Northeastern United States. It is bordered by Rhode Island to the east, Massachusetts to the north, New York to the west, and Long Island Sound to the south. Its cap ...
's Merritt Parkway (Connecticut State Route 15, Route 15) received sequential numbers in 1948, continuing the numbers of the
Hutchinson River Parkway The Hutchinson River Parkway (known colloquially as The Hutch) is a north–south parkway in southern New York in the United States. It extends for from the massive Bruckner Interchange in the Throggs Neck section of the Bronx to the New York ...
. The Merritt Parkway's lowest-numbered exit remains exit 27, although the Hutchinson exits were renumbered; traveling towards Connecticut, exit 30 is encountered at the border (also the beginning of Route 15), where the number resets to 27 before reascending. The remainder of Route 15's exit numbers (on the Wilbur Cross Parkway and Wilbur Cross Highway) continue the Merritt sequence. * The Pennsylvania Turnpike had sequential numbers when its first section opened on October 1, 1940, eventually using exits 1 to 30 for the mainline from Ohio to New Jersey. When the Northeast Extension was opened in the 1950s, it numbered the exits from 31 to 38 (and later 39). Only exit 31 retained its original number when the exits were renumbered. * The New Jersey Turnpike had sequential numbers when it opened in late 1951. Residents of New Jersey identify with these exit numbers, and even an in-state brewery made beers named for the exit numbers. * In the early 1950s, New Jersey's Garden State Parkway opened, probably the first road to use distance-based exit numbers. * The Gulf Freeway (US 75, later I-45) in Houston, Texas, had sequential numbers by 1956. The numbering scheme started at the freeway's northern end in downtown Houston, and counted up towards the southeast and Galveston.http://www.texasfreeway.com/Houston/historic/photos/images/i45_safety_barrier_july_1956.jpg *
Massachusetts Massachusetts (Massachusett language, Massachusett: ''Muhsachuweesut assachusett writing systems, məhswatʃəwiːsət'' English: , ), officially the Commonwealth of Massachusetts, is the most populous U.S. state, state in the New England ...
started handing out exit numbers in the 1950s to its freeways in and around the Boston area, with an uncommon system of making sure every freeway's intersection with Route 128 (Massachusetts), Route 128 was exit 25, numbers increasing away from Boston. Starting in 1976, these freeways started to receive more conventional numbering. , only the US 3 freeway retains its original numbering with the older system, to avoid exit confusion with Massachusetts Route 3, Route 3 (whose northernmost non-concurrent numbered exit is 20). By 2022, even these will be renumbered as part of the state's mile-based conversion.


References


Further reading

{{commons category, Exit number road signs in the United States * Signs Numbering Exits Installed on Parkways, ''The New York Times'' April 24, 1938, page 26 Road transportation in the United States Roads in the United States,