_
An_aurora_(plural:_auroras_or_aurorae),_also_commonly_known_as_the_polar_lights,_is_a_natural_light_display_in_Earth's_sky,_predominantly_seen_in__high-latitude_regions_(around_the_Arctic_and_Antarctic)._Auroras_display_dynamic_patterns_of_bri_...
_to_exit_the_freeway._The_road_at_this_exit_is_officially_designated_Utah_State_Route_259">SR 259,_a_short_connector;_however,_the_sign_instead_shows_Utah_State_Route_24.html" "title="Utah_State_Route_259.html" ;"title="Aurora,_Utah.html" "title="Sigurd,_Utah.html" "title="Interstate 70 in Utah signaling traffic destined for the towns of Sigurd, Utah">Sigurd
Sigurd ( non, Sigurðr ) or Siegfried (Middle High German: ''Sîvrit'') is a legendary hero of Germanic heroic legend, who killed a dragon and was later murdered. It is possible he was inspired by one or more figures from the Frankish Meroving ...
and Aurora, Utah">Aurora
An aurora (plural: auroras or aurorae), also commonly known as the polar lights, is a natural light display in Earth's sky, predominantly seen in high-latitude regions (around the Arctic and Antarctic). Auroras display dynamic patterns of bri ...
to exit the freeway. The road at this exit is officially designated Utah State Route 259">SR 259, a short connector; however, the sign instead shows Utah State Route 24">SR 24
Route 24, or Highway 24, can refer to:
International
* European route E24
Australia
* Lyell Highway (Tasmania)
* Central Arnhem Road, NT
Austria
* Verbindungsspange Rothneusiedel
Canada
* Alberta Highway 24
* British Columbia Highway 24
* M ...
, the highway at the other end of the connector.
An unsigned highway is a highway that has been assigned a route number, but does not bear road markings that would conventionally be used to identify the route with that number. Highways are left unsigned for a variety of reasons, and examples are found throughout the world. Depending on the policy of the agency that maintains the highway, and the reason for not signing the route, the route may instead be signed a different designation from its actual number, with small inventory markers for internal use, or with nothing at all.
Background
There are a variety of cases where roads are officially designated, but have no markings to show that designation. Many highway maintenance agencies assign some form of number to all highways, bridges, and other features they maintain for tracking and inventory purposes. However, policies vary regarding how and when to publicly post these assigned numbers. Several highway maintenance agencies have multiple numbering systems for the different classes of routes they maintain (freeways, expressways, rural roads, etc.). In such cases, one or more class of numbers may be reserved for minor routes and these may or may not be signed. Often roads that serve as a connector to a major highway are signed to show the connection to the major road, rather than the road's actual designation. Some highways are not signed to avoid multiple designations, such as when the entire route runs concurrent
Concurrent means happening at the same time. Concurrency, concurrent, or concurrence may refer to:
Law
* Concurrence, in jurisprudence, the need to prove both ''actus reus'' and ''mens rea''
* Concurring opinion (also called a "concurrence"), a ...
with other highways. There are several instances where a route has officially been given a name by government agencies, and is signed with that name, but the route is also assigned a number by the highway maintenance agencies as to fit in their maintenance and inventory systems. Another common reason to not sign a highway is where the highway is government maintained, but is of little value to the general public.
Examples
Highway maintenance agencies with multiple numbering systems
*The C, D, and U road systems in the Great Britain road numbering scheme
The Great Britain road numbering scheme is a numbering scheme used to classify and identify all roads in Great Britain.
Each road is given a single letter (which represents the road's category) and a subsequent number (between 1 and 4 digits) ...
are systems of routes considered less important than B roads and typically left unsigned.
*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 ...
, New York
New York most commonly refers to:
* New York City, the most populous city in the United States, located in the state of New York
* New York (state), a state in the northeastern United States
New York may also refer to:
Film and television
* '' ...
, and 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, ...
, among other jurisdictions, sign virtually all state maintained transportation features with small inventory markers, called maintenance road numbers (reference numbers), reference routes, and Quadrant Route
In the U.S. state of Pennsylvania, state highways are generally maintained by the Pennsylvania Department of Transportation (PennDOT). Each is assigned a four-digit State Route (SR) number in the present Location Referencing System. Traffic Routes ...
s respectively.
*Secondary
Secondary may refer to: Science and nature
* Secondary emission, of particles
** Secondary electrons, electrons generated as ionization products
* The secondary winding, or the electrical or electronic circuit connected to the secondary winding i ...
highways in states such as Montana
Montana () is a state in the Mountain West division of the Western United States. It is bordered by Idaho to the west, North Dakota and South Dakota to the east, Wyoming to the south, and the Canadian provinces of Alberta, British Columbi ...
are often unsigned (or minimally signed) when they pass through city or urban limits.
Signed with a name and not a number
*Queen Elizabeth Way
The Queen Elizabeth Way (QEW) is a 400-series highway in the Canadian province of Ontario linking Toronto with the Niagara Peninsula and Buffalo, New York. The freeway begins at the Peace Bridge in Fort Erie and travels around the western ...
(Highway 451) in Ontario
Ontario ( ; ) is one of the thirteen provinces and territories of Canada.Ontario is located in the geographic eastern half of Canada, but it has historically and politically been considered to be part of Central Canada. Located in Central Ca ...
*Skyline Drive
Skyline Drive is a National Parkway that runs the entire length of the National Park Service's Shenandoah National Park in the Blue Ridge Mountains of Virginia, generally along the ridge of the mountains. The drive's northern terminus is at a ...
and Blue Ridge Parkway
The Blue Ridge Parkway is a National Parkway and All-American Road in the United States, noted for its scenic beauty. The parkway, which is America's longest linear park, runs for through 29 Virginia and North Carolina counties, linking Shenand ...
( State Route 48) in Virginia
Virginia, officially the Commonwealth of Virginia, is a state in the Mid-Atlantic and Southeastern regions of the United States, between the Atlantic Coast and the Appalachian Mountains. The geography and climate of the Commonwealth ar ...
*Florida's Turnpike
Florida's Turnpike, designated as unsigned State Road 91 (SR 91), is a toll road in the U.S. state of Florida, maintained by Florida's Turnpike Enterprise (FTE). Spanning approximately along a northwest–southeast axis, the turnpike is in two s ...
(State Road 91) 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 ...
*Canal Parkway
Canal Parkway, which carries the unsigned Maryland Route 61 (MD 61) designation, is a state highway and automobile parkway in the U.S. state of Maryland. The road begins at the West Virginia state line at the North Branch Potomac River opposit ...
(State Route 61) in Maryland
*Several parkways and toll roads 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 ...
, including: Garden State Parkway
The Garden State Parkway (GSP) is a controlled-access toll road that stretches the north–south length of eastern New Jersey from the state's southernmost tip near Cape May to the New York state line at Montvale. Its name refers to New Jersey ...
(Route 444), southern portion of the New Jersey Turnpike
The New Jersey Turnpike (NJTP) is a system of controlled-access highways in the U.S. state of New Jersey. The turnpike is maintained by the New Jersey Turnpike Authority (NJTA).The Garden State Parkway, although maintained by NJTA, is not consi ...
(Route 700), the Palisades Interstate Parkway
The Palisades Interstate Parkway (PIP) is a limited-access highway in the U.S. states of New Jersey and New York (state), New York. The parkway is a major commuter route into New York City from Rockland County, New York, Rockland and Orange County ...
(Route 445 in New Jersey) and the Atlantic City Expressway
The Atlantic City Expressway, officially numbered, but unsigned, as Route 446 and abbreviated A.C. Expressway, ACE, or ACX, and known locally as the Expressway, is a long toll road in the U.S. state of New Jersey, managed and operated by t ...
(Route 446).
* The Kentucky parkway system of former toll roads were initially signed exclusively with their names, although all carry an unsigned designation above 9000.
Concurrencies
There are numerous cases in the United States where the same physical roadbed has designations in the Interstate Highway System
The Dwight D. Eisenhower National System of Interstate and Defense Highways, commonly known as the Interstate Highway System, is a network of controlled-access highways that forms part of the National Highway System in the United States. Th ...
, U.S. Highway
The United States Numbered Highway System (often called U.S. Routes or U.S. Highways) is an integrated network of roads and highways numbered within a nationwide grid in the contiguous United States. As the designation and numbering of these h ...
system and the state route system. In many cases one or more of the official designations is omitted.
*Many examples exist in the western United States
The Western United States (also called the American West, the Far West, and the West) is the region comprising the westernmost states of the United States. As American settlement in the U.S. expanded westward, the meaning of the term ''the Wes ...
where an Interstate highway runs concurrent with a U.S. or state highway, but only the Interstate designation is signed, though any route that becomes unsigned in these situations will still be signed on many road maps and atlases. Examples include U.S. Route 6
U.S. Route 6 (US 6), also called the Grand Army of the Republic Highway, honoring the American Civil War veterans association, is a main route of the U.S. Highway system. While it currently runs east-northeast from Bishop, California, to P ...
which is unsigned while concurrent with Interstate 70
Interstate 70 (I-70) is a major east–west Interstate Highway System, Interstate Highway in the United States that runs from Interstate 15, I-15 near Cove Fort, Utah, to a park and ride lot just east of Interstate 695 (Maryland), I-695 in ...
throughout 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 ...
and U.S. Route 77
U.S. Route 77 (US 77) is a major north–south United States Numbered Highway which extends for in the central United States. As of 2005, Its southern terminus is in Brownsville, Texas, at Veteran's International Bridge on the Mexican border, w ...
through the Dallas metropolitan area
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 ...
.
*Conversely, there are several urban Freeways in the U.S. that are signed only with their U.S. Highway designation, not the Interstate Highway designation. Examples include: Interstate 444
Interstate 444 (I-444) is an unsigned auxiliary route of the Interstate Highway System, with both ends at I-244 in downtown Tulsa in the US state of Oklahoma. It makes up the eastern and southern sections on the square-shaped Inner Dispers ...
in 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 ...
, Interstate 345
Interstate 345 (I-345) is a Auxiliary Interstate Highway in the city of Dallas within the US state of Texas. It is a freeway that connects I-45 (which ends at the interchange with I-30) with U.S. Highway 75 (US 75; North Centra ...
in 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 ...
, Interstate 305 in 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 ...
, and Interstate 595 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 ...
.
*The Interstate Highway System includes highways outside the contiguous United States
The contiguous United States (officially the conterminous United States) consists of the 48 adjoining U.S. states and the Federal District of the United States of America. The term excludes the only two non-contiguous states, Alaska and Hawaii ...
. While the interstate highways in Hawaii
Hawaii ( ; haw, Hawaii or ) is a state in the Western United States, located in the Pacific Ocean about from the U.S. mainland. It is the only U.S. state outside North America, the only state that is an archipelago, and the only stat ...
are signed similar to those in the contiguous United States, those in 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., ...
and Puerto Rico
Puerto Rico (; abbreviated PR; tnq, Boriken, ''Borinquen''), officially the Commonwealth of Puerto Rico ( es, link=yes, Estado Libre Asociado de Puerto Rico, lit=Free Associated State of Puerto Rico), is a Caribbean island and Unincorporated ...
are signed with their state/territory route designation, not Interstate Highway shields.
*In the states of 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 ...
, 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 ...
, and 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 ...
, every US Highway is concurrent with an unsigned state highway for its entire length. In the states of Florida and 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 ...
, every Interstate Highway is concurrent with an unsigned state highway for its entire length. In Tennessee, the state highway route number is signed along the green mile marker signs that display mileage within each county.
Other situations
*There are a small number of cases where a highway briefly crosses a political boundary, but is only signed with its designation on one side of that political boundary. Examples include the