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A frontage road (also known as an access road, outer road, service road, feeder road, or parallel road) is a local road running
parallel Parallel is a geometric term of location which may refer to: Computing * Parallel algorithm * Parallel computing * Parallel metaheuristic * Parallel (software), a UNIX utility for running programs in parallel * Parallel Sysplex, a cluster of ...
to a higher-speed, limited-access road. A frontage road is often used to provide access to private driveways, shops, houses, industries or farms. Where parallel high-speed roads are provided as part of a major highway, these are also known as local-express lanes. A frontage lane is a paved path that is used for the transportation and travel from one street to another. Frontage lanes, closely related to a frontage road, are common in metropolitan areas and in small rural towns. Frontage lanes are technically not classified as roads due to their purpose as a bridge from one road to another, and due to the architectural standards that they are not as wide as a standard road, or used as commonly as a standard road, street, or avenue.


Overview

Frontage roads provide access to homes and businesses which would otherwise be cut off by a limited-access road and connect these locations with roads which have direct access to the main roadway. Frontage roads give indirect access to abutting property along a
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 ...
, either preventing the
commercial Commercial may refer to: * a dose of advertising conveyed through media (such as - for example - radio or television) ** Radio advertisement ** Television advertisement * (adjective for:) commerce, a system of voluntary exchange of products and s ...
disruption of an
urban area An urban area, built-up area or urban agglomeration is a human settlement with a high population density and infrastructure of built environment. Urban areas are created through urbanization and are categorized by urban morphology as cities ...
that the freeway traverses or allowing commercial development of abutting
property Property is a system of rights that gives people legal control of valuable things, and also refers to the valuable things themselves. Depending on the nature of the property, an owner of property may have the right to consume, alter, share, r ...
. At times, they add to the cost of building an expressway due to costs of land acquisition and the costs of paving and maintenance. However, the benefits of developing nearby
real estate Real estate is property consisting of land and the buildings on it, along with its natural resources such as crops, minerals or water; immovable property of this nature; an interest vested in this (also) an item of real property, (more general ...
can more than offset the cost of building the frontage roads. Furthermore, a frontage road may be a part of an older
highway A highway is any public or private road or other public way on land. It is used for major roads, but also includes other public roads and public tracks. In some areas of the United States, it is used as an equivalent term to controlled-acces ...
, so the expense of building a frontage road may be slight. And finally, the cost to purchase access rights from adjacent property may exceed the costs to build frontage roads. Conversely, the existence of a frontage road can increase traffic on the main road and be a catalyst for development; hence there is sometimes an explicit decision made to not build a frontage road. A backage road is a similar concept, but lies on the back side of the land parcels that abut the controlled access's right of way. Like the frontage road, it serves mainly to provide access to those parcels as an alternative to a frontage road.


Advantages

There are several advantages to using frontage roads. One advantage is to separate local traffic from through traffic. When frontage roads are lacking in an urban area, the highway is used as a local road, reducing speeds and increasing congestion. Another advantage occurs when the highway is closed or just obstructed. This pushes traffic off the highway. Where an urban area has frontage roads, the traffic can easily bypass the obstruction or closure on the frontage road. Where an urban area has no frontage road, traffic is diverted onto and congests local roads, since there is no formal (frontage road) alternative.


Disadvantages

There are also some disadvantages to using frontage roads. When frontage roads are used without controlling the access to the primary road, at every intersection where an intersecting road runs across the primary, the number of conflict points increases one fold for each frontage road, since each frontage road is itself another intersection. A highway with frontage roads can be difficult for pedestrians to cross, for a variety of reasons including, but not limited to when neither the primary road nor the crossing is elevated, or gaps in traffic are few and the intervals between those gaps is long. Such examples include: *
US 190 U.S. Route 190 (US 190) is an east–west United States Highway in Louisiana and Texas. Segments of US 190 will be upgraded to Interstate 14 (I-14); the first segment was opened on January 26, 2017. Route description , - , TX , , - , ...
in
East Baton Rouge Parish East Baton Rouge Parish (french: Paroisse de Bâton Rouge Est) is the most populous parish in the U.S. state of Louisiana. At the 2010 U.S. census, its population was 440,171, and 456,781 at the 2020 census. The parish seat is Baton Rouge, ...
,
Louisiana Louisiana , group=pronunciation (French: ''La Louisiane'') is a state in the Deep South and South Central regions of the United States. It is the 20th-smallest by area and the 25th most populous of the 50 U.S. states. Louisiana is borde ...
; * LA 1 in
West Baton Rouge Parish West Baton Rouge Parish (french: Paroisse de Bâton Rouge Ouest) is one of the sixty-four parishes in the U.S. state of Louisiana. Established in 1807, its parish seat is Port Allen. With a 2020 census population of 27,199 residents, West Baton ...
, Louisiana; * Palatine Road in
Cook County Cook County is the most populous county in the U.S. state of Illinois and the second-most-populous county in the United States, after Los Angeles County, California. More than 40% of all residents of Illinois live within Cook County. As of 20 ...
,
Illinois Illinois ( ) is a state in the Midwestern United States. Its largest metropolitan areas include the Chicago metropolitan area, and the Metro East section, of Greater St. Louis. Other smaller metropolitan areas include, Peoria and Rockf ...
; * The northeast edge of
Spur 503 Spur 503, also known locally as Eisenhower Parkway is state highway spur route in southern Denison, Texas. The highway is a limited access freeway from US 75 to SH 91. The rest of the route is a surface street to its terminus at US 69. The en ...
in Denison, Texas; * The Southeast edge of U.S. Route 69 in
McAlester, Oklahoma McAlester is the county seat of Pittsburg County, Oklahoma. The population was 18,363 at the time of the 2010 census, a 3.4 percent increase from 17,783 at the 2000 census,Shuller, Thurman"McAlester" profile ''Encyclopedia of Oklahoma History an ...
. A complex example is
US 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 ...
/Commerce () in Ardmore, Oklahoma, particularly at the Grand Avenue intersection. Right turns from the central carriageways are not allowed; a slip ramp must be taken to the
two-way Two-way or Two Way may refer to: * " 2-Way", single by rapper Lil' Romeo * Two-way, Cincinnati chili topped on spaghetti * "Two Way" (KT Tunstall and James Bay duet), 2016 See also * * * * 3-Way (disambiguation) {{Disambiguation ...
frontage road, where the turning traffic must yield to the through traffic. Only then can a vehicle make a right turn from the signal on the frontage road. Furthermore, frontage roads can increase
urban sprawl Urban sprawl (also known as suburban sprawl or urban encroachment) is defined as "the spreading of urban developments (such as houses and shopping centers) on undeveloped land near a city." Urban sprawl has been described as the unrestricted growt ...
. Land along highways is made open for development, allowing shopping centers and other buildings to sprawl.


Collector–express

The successor to the concept of service/frontage roads in urban freeways is the collector–express system, which is designed to handle closely spaced interchange ramps without disrupting through traffic. Unlike service roads, the collector lanes are typically high-speed full controlled-access lanes, conforming to freeway requirements. The collector lanes may also be known as a collector/distributor road and slip ramps provide access to and from the express/mainline lanes. Frontage roads may feed into and from collector/distributor roads near some interchanges.


Examples


Argentina

In
Argentina Argentina (), officially the Argentine Republic ( es, link=no, República Argentina), is a country in the southern half of South America. Argentina covers an area of , making it the second-largest country in South America after Brazil, th ...
, especially around
Buenos Aires Buenos Aires ( or ; ), officially the Autonomous City of Buenos Aires ( es, link=no, Ciudad Autónoma de Buenos Aires), is the capital and primate city of Argentina. The city is located on the western shore of the Río de la Plata, on South ...
, frontage roads known as colectoras can be found next to freeways. Examples include
Avenida General Paz Avenida General Paz (official name Ruta Nacional A001 - National Route A001) is a beltway freeway surrounding the city of Buenos Aires. Roughly following the boundary between the city and Buenos Aires Province, it is one of the few motorways in A ...
, Ruta 8, and Ruta 9 coming into Buenos Aires.


Canada

Ontario: A freeway with a significant remaining network of service roads is the
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 ...
(QEW). However, most of the slip ramps between St. Catharines and Mississauga were removed during major reconstruction in the 1970s and 1990s. Service roads are no longer able to directly access the QEW; they have been rerouted to intersections with other major roads which have interchanges with the QEW. Nonetheless, the service roads are positioned too close to the QEW to easily widen the freeway unless all the private properties along the service road are bought out. This would be unlikely in the current political environment. The only remaining slip ramps connecting to service roads are on the QEW running through St. Catharines. These dangerous low-standard ramps (due to lack of acceleration/deceleration lanes) are due to be replaced in a planned extensive reconstruction of the QEW that is currently underway. Similar service roads and slip ramps exist along
Highway 401 King's Highway 401, commonly referred to as Highway 401 and also known by its official name as the Macdonald–Cartier Freeway or colloquially referred to as the four-oh-one, is a controlled-access 400-series highway in the Canadian provinc ...
through Oshawa, but like through St. Catharines, these are also in the process of being replaced with modern ramps. Highway 427 had its service roads replaced with a collector-express system in the 1970s. However, it has several RIRO access onramps and offramps to serve residential traffic in addition to its standard
parclo interchange A partial cloverleaf interchange or parclo is a modification of a cloverleaf interchange. The design has been well received, and has since become one of the most popular freeway-to- arterial interchange designs in North America. It has also be ...
s with major arterials. List of service roads on the QEW: * series of broken sections from Cawthra Road in Mississauga to the
Garden City Skyway The Garden City Skyway is a major high-level bridge located in St. Catharines and Niagara-on-the-Lake, Ontario, Canada, that allows the Queen Elizabeth Way (QEW) to cross the Welland Canal without the interruption of a lift bridge. Six lanes of ...
in St. Catharines. List of service roads on the 403: * North Service Road at QEW/407 junction to Waterdown Rd, Burlington * Service Road at Guelph Line, Burlington List of RIRO on the 427: * Gibbs Road onto North 427 * Eva Road onto/off South 427 * Holiday Drive onto/off South 427 * Eringate Drive onto/off South 427 * Valhalla Inn Road onto North 427 Quebec: Many autoroutes in the Montreal area (including the A-40, A-520, A-13, A-15 and A-25) maintain networks of frontage roads along at least some of their lengths as they pass through urban/developing areas.


Mexico

In Guadalajara, the López Mateos, Vallarta and Mariano Otero avenues (the latter in the stretch between López Mateos to Niños Héroes) are 2-lane avenues surrounded by two one-way frontage roads. Lázaro Cárdenas Expressway is similar, but with three lanes in both the central road and the frontage roads. Because these frontage roads are considered as part of the avenue itself, the central road is known locally as the "central lanes", whereas the frontage roads are known as "lateral lanes". Turns are always forbidden in the central lanes; drivers wishing to make a turn must leave the central lanes and make the turn from the lateral lanes.


Netherlands

Frontage roads are common in the Netherlands and detailed in the Dutch national design manual for bicycle traffic as per pages 121 and 127 where they are referred to as parallel roads. In the Netherlands, engineers have used frontage roads to benefit cyclists as well as automobiles. Because frontage roads only carry local traffic, the speed on these roads is low (their speed limit is 30 km/h), making them an ideal environment for bicyclists. Because the speed and volume is so low, no additional treatments are needed to make a service road a safe bike facility. In the Netherlands, service roads are often linked together with bike paths to help create a comprehensive bicycle route, with the bike path links serving as barriers to through motor traffic. Since service roads serve a dual purpose, they are an inexpensive way to create routes in cycling network, compared to cycletracks or stand-alone bike paths. Extensive amounts of information on frontage roads can be found on Northeastern's webpage.


Mainland China

In the
People's Republic of China China, officially the People's Republic of China (PRC), is a country in East Asia. It is the world's most populous country, with a population exceeding 1.4 billion, slightly ahead of India. China spans the equivalent of five time zones and ...
mainland Mainland is defined as "relating to or forming the main part of a country or continent, not including the islands around it egardless of status under territorial jurisdiction by an entity" The term is often politically, economically and/or dem ...
, roads running next to expressways, taking outgoing traffic and feeding incoming traffic, are called either service roads or auxiliary roads (''fudao'' locally). Where expressways cross larger urban areas, such frontage roads may run next to the expressway itself. Much of the Beijing portion of the Jingkai Expressway, for example, has, in fact,
China National Highway 106 China National Highway 106 (G106; , 106 Guo Dao) is a road from Beijing to Guangzhou. It leaves Beijing at Yuquanying and heads to Gu'an County, Bazhou (Hebei), Kaifeng (Henan), Ezhou (Hubei), and eventually Guangzhou (Guangdong) on the south ...
acting as a split-direction frontage road. Many newer urban highways are entirely elevated, with parallel access roads running beneath the entire length.


Philippines


Expressways

The
North Luzon Expressway The North Luzon Expressway (NLEX), signed as E1 of the Philippine expressway network, partially as N160 of the Philippine highway network, and R-8 of the Metro Manila arterial road network, is a limited-access toll expressway that connects ...
maintains two-way service roads that run along both sides of the expressway within
Metro Manila Metropolitan Manila (often shortened as Metro Manila; fil, Kalakhang Maynila), officially the National Capital Region (NCR; fil, link=no, Pambansang Punong Rehiyon), is the seat of government and one of three defined metropolitan areas in ...
limits, which extend from exits and merge into local roads. To the south, the
South Luzon Expressway The South Luzon Expressway (SLEX), signed as E2 of the Philippine expressway network and R-3 of the Metro Manila arterial road network, is a limited-access toll expressway that connects Metro Manila to the provinces in the Calabarzon region ...
's Metro Manila Skyway and Pres. Sergio Osmeña Sr. Highway segments (both are apparently local and express roads) has two two-way service roads and the PNR running alongside the road. The tracks are between the East Service Road and the highway, giving access to train stations from Pasay Road railway station to
Bicutan railway station Bicutan station is a railway station located on the South Main Line in Parañaque, Metro Manila, Philippines. The station is the fourteenth station southbound from Tutuban and is the only PNR station in Parañaque. Nearby landmarks The statio ...
. The service roads begin at Gil Puyat Avenue up until the
Filinvest City Filinvest City, formerly Filinvest Corporate City, is a central business district situated within the City of Muntinlupa in Metro Manila, Philippines. History The development of Filinvest City began in 1995, by Filinvest at the site of the ...
exit.


Other roads

Other major roads in the country with two-way service roads include
Roxas Boulevard Roxas Boulevard is a popular waterfront promenade in Metro Manila in the Philippines. The boulevard, which runs along the shores of Manila Bay, is well known for its sunsets and stretch of coconut trees. The divided roadway has become a tradema ...
, which service roads catering to local establishments along the thoroughfare. The East Service Road runs from
Kalaw Avenue Kalaw Avenue (formerly ''T.M. Kalaw Street'') is a short stretch of road in the Ermita district of Manila, Philippines. It forms the southern boundary of Rizal Park running east–west from San Marcelino Street to Roxas Boulevard near the center of ...
in
Ermita Ermita is a district in Manila, Philippines. Located at the central part of the city, the district is a significant center of finance, education, culture, and commerce. Ermita serves as the civic center of the city, bearing the seat of city ...
,
Manila Manila ( , ; fil, Maynila, ), officially the City of Manila ( fil, Lungsod ng Maynila, ), is the capital of the Philippines, and its second-most populous city. It is highly urbanized and, as of 2019, was the world's most densely populate ...
to C. Rivera Street in
Pasay Pasay, officially the City of Pasay ( fil, Lungsod ng Pasay; ), is a 1st class highly urbanized city in the National Capital Region of the Philippines. According to the 2020 census, it has a population of 440,656 people. Due to its location j ...
while the shorter West Service Road runs from Vicente Sotto Street to Gil Puyat Avenue within Bay City.
Ortigas Avenue Ortigas Avenue is a highway running from eastern Metro Manila to western Rizal in the Philippines. It is one of the busiest highways in Metro Manila, serving as the main thoroughfare of the metro's east–west corridor, catering m ...
in Greenhills, San Juan contains two service roads. The eastbound one-way service roads from Roosevelt Street to Wilson Street, and from Wilson Street to Connecticut Street provide access to establishments along the road while serving as bus stops for
bus routes A bus (contracted from omnibus, with variants multibus, motorbus, autobus, etc.) is a road vehicle that carries significantly more passengers than an average car or van. It is most commonly used in public transport, but is also in use for cha ...
along Ortigas Avenue. A westbound one-way service road from Connecticut Street to Club Filipino Avenue is primarily a local-express road setup which distributes traffic to the Greenhills Shopping Center and pass-through traffic along Ortigas Avenue.
Quezon Avenue Manuel L. Quezon Avenue, more often called as Quezon Avenue, or simply Quezon Ave (pronounced: ''Ke-zon-Av''), is a major thoroughfare in Metro Manila named after President Manuel Luis Quezon, the second president of the Philippines. The a ...
in
Quezon City Quezon City (, ; fil, Lungsod Quezon ), also known as the City of Quezon and Q.C. (read in Filipino as Kyusi), is the most populous city in the Philippines. According to the 2020 census, it has a population of 2,960,048 people. It was fou ...
runs an eastbound one-way service road from West Avenue and East Avenue to its intersection with
EDSA Epifanio de los Santos Avenue, commonly referred to by its acronym EDSA, is a limited-access circumferential highway around Manila, the capital city of the Philippines. It passes through 6 of Metro Manila's 17 local government units or citie ...
.


Hong Kong

Frontage roads exist both in city and along major expressways between new towns. Gloucester Road has frontage road running parallel of it from east to west. Cheung Tung Road serves as the frontage road for
North Lantau Highway North Lantau Highway is an expressway forming part of Hong Kong's Route 8, linking Hong Kong International Airport and Lantau Island with the rest of the territory. The road has three lanes in each direction for its entire length with ful ...
,
Hiram's Highway Hiram's Highway () is a road in Hong Kong connecting the town of Sai Kung to the Clear Water Bay Road at Ta Ku Ling. It also connects with Po Tung Road in the north. Unlike other roads in Hong Kong with the word "Highway" as part of their names ...
for New Hiram's Highway, and Tai Wo Service Road West and Tai Wo Service Road East for
Fanling Highway Fanling Highway () is a part of Route 9 in Hong Kong. It connects the new town of Tai Po and San Tin Highway, passing through Sheung Shui and Fanling on its way. The three lane expressway was constructed between 1983 and 1987. Alignment The ro ...
. Castle Peak Road serves the purpose as a frontage road of
Tuen Mun Road Tuen Mun Road is a major expressway in Hong Kong which connects Tuen Mun with Tsuen Wan, within the New Territories. It is part of Hong Kong's Route 9, which circumnavigates the New Territories. Opened in 1978, it was once the major trunk rou ...
to some extent.


India

In India, frontage roads or Service lanes (sometimes called नल्ला "Nullah" in Hindi) exist on most high density dual carriageway roads and dual carriageway highways. On Access controlled Expressways like the
Yamuna Expressway Yamuna Expressway is a 6- lane wide (expandable to 8) and 165.5 km long access-controlled expressway in the Indian state of Uttar Pradesh. It is presently India's 3rd longest expressway since February 2017. It was built to de-congest the old ...
, the frontage roads remain separate from the main carriageway throughout the road's length. Retrofitted and previously non-access controlled roads, such as most
National Highways National Highways, formerly the Highways Agency and later Highways England, is a government-owned company charged with operating, maintaining and improving motorways and major A roads in England. It also sets highways standards used by all f ...
, only have service lanes on stretches where fly-overs (overpasses) are built over junctions or through towns.


United States

Alaska Though
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. ...
has very few roads that are built to freeway standard, a couple of the highways that are do have frontage roads; notably along the
Seward Highway The Seward Highway is a highway in the U.S. state of Alaska that extends from Seward to Anchorage. It was completed in 1951 and runs through the scenic Kenai Peninsula, Chugach National Forest, Turnagain Arm, and Kenai Mountains. The Seward H ...
( Alaska Route 1) with Homer Drive running south (from Tudor Road to Dimond Boulevard) and Brayton Drive running north (from DeArmoun Road to Tudor Road); and the
Minnesota Drive Expressway The Minnesota Drive Expressway is a south–north expressway located in the city of Anchorage, Alaska, United States. The expressway includes a small portion of O'Malley Road, which is also built to expressway standards. The highway travels fr ...
(from West 100th Ave to Dimond Boulevard) in South Anchorage. Also, the George Parks Highway (
Alaska Route 3 03 may refer to: __NOTOC__ Dates The years 1803, 1903, or 2003 Music * ''03'' (Twelve album), 2007 * ''03'' (Son of Dave album), 2008 * ''03'' (Urban Zakapa album), 2013 Other uses * 03 numbers, a non-geographic telephone number range in the ...
) has
two-way Two-way or Two Way may refer to: * " 2-Way", single by rapper Lil' Romeo * Two-way, Cincinnati chili topped on spaghetti * "Two Way" (KT Tunstall and James Bay duet), 2016 See also * * * * 3-Way (disambiguation) {{Disambiguation ...
frontage roads running along it from the Trunk Road exit to the Seward Meridian Parkway exit (Fireweed Road on the south side and Blue Lupine Drive on the north side) in Wasilla.


Arizona

Frontage roads are not very common in Arizona but do exist along certain freeways. In metropolitan Phoenix, the state's first freeway,
Interstate 17 Interstate 17 (I-17) is a north–south Interstate Highway entirely within the US state of Arizona. I-17's southern terminus lies in Phoenix, at I-10, and its northern terminus is in Flagstaff, at Milton Road north of I-40. Most of I-17 ...
has a frontage road (Black Canyon Highway); some sections of the frontage road was reduced to a single lane in the 1990s when I-17 was widened. Several freeways overbuilt existing arterials, which were converted to frontage roads: Price Road (Tempe), Pima Road (Scottsdale) and Beardsley Road (north Phoenix) on the
Loop 101 Arizona State Route 101 (SR 101) or Loop 101 is a semi-beltway looping around the Phoenix Metropolitan Area in central Arizona. It connects several suburbs of Phoenix, including Tolleson, Glendale, Peoria, Scottsdale, Mesa, Tempe, and C ...
, as well as 59th Avenue on the
Loop 202 Arizona State Route 202 (SR 202) or Loop 202 is a semi-beltway circling the eastern and southern areas of the Phoenix metropolitan area in central Arizona. It traverses the eastern end and the southern end of the city of Phoenix, ...
Ed Pastor (South Mountain) Freeway. In Tucson, I-10 has a two-lane, one-way frontage road, and in between Casa Grande and Tucson, a two-lane,
two-way Two-way or Two Way may refer to: * " 2-Way", single by rapper Lil' Romeo * Two-way, Cincinnati chili topped on spaghetti * "Two Way" (KT Tunstall and James Bay duet), 2016 See also * * * * 3-Way (disambiguation) {{Disambiguation ...
frontage road.


California

The East Shore Freeway, a
wrong-way concurrency A concurrency in a road network is an instance of one physical roadway bearing two or more different route numbers. When two roadways share the same right-of-way, it is sometimes called a common section or commons. Other terminology for a concurr ...
of 80 and
580 __NOTOC__ Year 580 (Roman numerals, DLXXX) was a leap year starting on Monday (link will display the full calendar) of the Julian calendar. The denomination 580 for this year has been used since the early medieval period, when the Anno Domini c ...
in Berkeley and Emeryville, is served by a frontage which retains the name of the previous road that ran through the corridor: the Eastshore Highway. It is also served by another frontage on the other side of the freeway: West Frontage Road. Interstate 210 in California near Pasadena and Arcadia has frontage roads which include Corson Street in Pasadena (parallel to I-210 West) and Maple Street (parallel to I-210 East) in Pasadena, while Central Avenue (parallel to I-210 West) and Evergreen Avenue (parallel to I-210 East) are in Arcadia. In Orange County, frontage roads exist on sections of these four highways: *
Interstate 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 ...
(Santa Ana Freeway) between Anaheim Boulevard and State College Boulevard in Anaheim. The northbound frontage road is Anaheim Way and the southbound frontage road is Manchester Avenue. * California State Highway 55 (Costa Mesa Freeway) from its southern terminus north of 19th Street up to Bristol Street in
Costa Mesa Costa may refer to: Biology * Rib (Latin: ''costa''), in vertebrate anatomy * Costa (botany), the central strand of a plant leaf or thallus * Costa (coral), a stony rib, part of the skeleton of a coral * Costa (entomology), the leading edge of th ...
Both the northbound and southbound frontage roads are signed as Newport Boulevard. * California State Highway 73 (Corona del Mar Freeway) from Red Hill Avenue to Jamboree Road in
Newport Beach Newport Beach is a coastal city in South Orange County, California. Newport Beach is known for swimming and sandy beaches. Newport Harbor once supported maritime industries however today, it is used mostly for recreation. Balboa Island draws ...
. Both the northbound and southbound frontage roads are signed as Bristol Street. *The expressway section of Jamboree Road from Edinger Avenue to the start of the SR 261 Toll Road in Irvine.


Illinois

Frontage roads are common in
Chicago (''City in a Garden''); I Will , image_map = , map_caption = Interactive Map of Chicago , coordinates = , coordinates_footnotes = , subdivision_type = Country , subdivision_name ...
, where they usually have the name of the street in its place had before the adjacent expressway was constructed. Parts of the
Edens Expressway Iens ( nl, Edens) is a small village in Súdwest-Fryslân in the province Friesland of the Netherlands with a population of around 32 in January 2017. History The village was first mentioned in the 13th century as Ederinghe, and means "settlem ...
, the
Dan Ryan Expressway The Dan Ryan Expressway is an expressway in Chicago that runs from the Circle Interchange with Interstate 290 (I-290) near Downtown Chicago through the South Side of the city. It is designated as both I-90 and I-94 south to 66th Street, ...
, the
Eisenhower Expressway Interstate 290 (I-290) is an auxiliary Interstate Highway that runs westward from the Chicago Loop. The portion of I-290 from I-294 to its east end is officially called the Dwight D. Eisenhower Expressway. In short form, it is known as "t ...
, and the
Kennedy Expressway The John F. Kennedy Expressway is a nearly freeway in Chicago, Illinois, United States. Portions of the freeway carry I-190, I-90 and I-94. The freeway runs in a southeast–northwest direction between the central city neighborhood of the ...
use frontage roads. In addition, the stretches of Interstate 290 and the Elgin–O'Hare Expressway in Schaumburg have frontage roads.


Massachusetts

Service roads are relatively uncommon in much of New England, and in Boston in particular, largely due to resistance to expressway construction, which necessitated scaled-back rights of way. Still, some unique examples of the type exist in the
Rose Fitzgerald Kennedy Greenway The Rose Fitzgerald Kennedy Greenway is a linear park located in several Downtown Boston neighborhoods. It consists of landscaped gardens, promenades, plazas, fountains, art, and specialty lighting systems that stretch over one mile through Chin ...
Surface Road, Cross street, and Atlantic Avenue in downtown Boston. As a result of the
Big Dig The Central Artery/Tunnel Project (CA/T Project), commonly known as the Big Dig, was a megaproject in Boston that rerouted the Central Artery of Interstate 93 (I-93), the chief highway through the heart of the city, into the 1.5-mile (2.4&n ...
, the carriageways of these streets were re-aligned to function as a
two-way Two-way or Two Way may refer to: * " 2-Way", single by rapper Lil' Romeo * Two-way, Cincinnati chili topped on spaghetti * "Two Way" (KT Tunstall and James Bay duet), 2016 See also * * * * 3-Way (disambiguation) {{Disambiguation ...
service road system through downtown Boston with the Rose Kennedy Greenway park system as their 'median', and the expressway underground. In this special case of a service road, the subterranean I-93 Central Artery expressway is not visible from the surface, but accessible through access ramps into the tunnel system. Just south of downtown, I-93 also includes a short section at-grade service road between exits 16 in South Boston and the I-90 interchange south of Chinatown, in a more typical arrangement of the concept. Typical service roads also exist along the eight-lane freeway section of
Massachusetts Route 2 Route 2 is a major east–west state highway in Massachusetts. Along with Route 9 and U.S. Route 20 to the south, these highways are the main alternatives to the Massachusetts Turnpike/I-90 toll highway. Route 2 runs the entire ...
through Arlington and Belmont (two near northwestern suburbs of Boston) and
United States Route 1 U.S. Route 1 or U.S. Highway 1 (US 1) is a major north–south United States Numbered Highway that serves the East Coast of the United States. It runs from Key West, Florida, north to Fort Kent, Maine, at the Canadian border, making ...
in Lynnfield.


Michigan

Frontage roads are also common in
Metro Detroit The Detroit metropolitan area, often referred to as Metro Detroit, is a major metropolitan area in the U.S. State of Michigan, consisting of the city of Detroit and its Southeast Michigan, surrounding area. There are varied definitions of the a ...
, where they are usually referred to as "service drives." As in Texas, they typically run one-way with frequent slip ramps to and from the limited-access roadway, with
Texas U-turn A Texas U-turn, or Texas turnaround, boomerang, or loop around, is a lane allowing cars traveling on one side of a one-way frontage road to U-turn onto the opposite frontage road (typically crossing over or under a freeway or expressway). Typical ...
s at or near many intersections. Unlike Texas, there is usually little commercial development situated along the frontage road itself (se
example
; the road serves to provide access to the freeway from existing residential streets and commercial surface thoroughfares. Also unlike in many locales in urban Texas, where an exit ramp may actually precede the entrance ramp for the previous interchange to facilitate access to businesses situated directly on the frontage road (in effect, the two interchanges overlap along the frontage road), Michigan slip ramps to and from frontage roads are generally positioned as they normally would be in the absence of the frontage road. Motorists entering and exiting the freeway are not sharing the frontage road simultaneously to as large a degree, reducing weaving. Access to the frontage road between exits is provided by turnarounds and frequent bridging, generally every 1/2 mile, between exits. Michigan left hand turns are also quite common at surface street-frontage road intersections, with dedicated turnaround lanes (similar to the Texas U-turn) built over the freeway on separate bridges approximately 100 meters from the main intersection and bridging. With the exceptions of Interstate 275 and the freeway portion of M-53, every Metro Detroit freeway has a frontage road along it for at least a portion of its length. Several other freeways outside Metro Detroit use these as well. There are two other cities in Michigan where frontage roads running more than one mile in length outside of Metro Detroit can be found. There are frontage roads along Interstate 496 and U.S. Route 127 in Greater
Lansing Lansing () is the capital of the U.S. state of Michigan. It is mostly in Ingham County, although portions of the city extend west into Eaton County and north into Clinton County. The 2020 census placed the city's population at 112,644, makin ...
and along Interstate 475 in Downtown
Flint Flint, occasionally flintstone, is a sedimentary cryptocrystalline form of the mineral quartz, categorized as the variety of chert that occurs in chalk or marly limestone. Flint was widely used historically to make stone tools and sta ...
. Outside the cities, US-23 has them from Ann Arbor to Fenton, while US-127 has them from Leslie to Mason. New freeway construction in Michigan has not included frontage roads since the completion of
Interstate 696 Interstate 696 (I-696) is an east–west auxiliary Interstate Highway in the Metro Detroit region of the US state of Michigan. The state trunkline highway is also known as the Walter P. Reuther Freeway, named for the prominent auto industr ...
, most of which was constructed along the rights of way of major surface arteries, in 1989. Michigan does not build frontage roads in rural areas.


Montana

Along
Interstate 15 Interstate 15 (I-15) is a major Interstate Highway in the western United States, running through Southern California and the Intermountain West. I-15 begins near the Mexican border in San Diego County and stretches north to Alberta, Cana ...
, most rural sections of the former US 91 are still in service as frontage roads between Lima and
Butte __NOTOC__ In geomorphology, a butte () is an isolated hill with steep, often vertical sides and a small, relatively flat top; buttes are smaller landforms than mesas, plateaus, and tablelands. The word ''butte'' comes from a French word me ...
, Butte and Helena, Helena and Great Falls, and from Great Falls north to Shelby. Some former sections of US 10 in the west (Saint Regis to Butte along Interstate 90) and east (
Billings Billings is the largest city in the U.S. state of Montana, with a population of 117,116 as of the 2020 census. Located in the south-central portion of the state, it is the seat of Yellowstone County and the principal city of the Billings Met ...
to
North Dakota North Dakota () is a U.S. state in the Upper Midwest, named after the indigenous Dakota Sioux. North Dakota is bordered by the Canadian provinces of Saskatchewan and Manitoba to the north and by the U.S. states of Minnesota to the east, So ...
along Interstate 94) also serve as frontage roads.


Missouri

Missouri has built frontage roads, typically named "Outer Roads", along Interstate 44 (when it was designated as US 66) between Springfield and Greater St. Louis and along US 67 (not all of it up to freeway standards) between Festus and Poplar Bluff. Outer roads are also found on Interstate 64 in West St. Louis County, Interstate 270 in North St. Louis County, and Missouri Highway 367 between I-270 and Lindbergh Blvd.


New York

One-way service roads on either sides of highways are relatively common in New York City and the surrounding areas. Due to the high
urban density Urban density is a term used in urban planning and urban design to refer to the number of people inhabiting a given urbanized area. As such it is to be distinguished from other measures of population density. Urban density is considered an import ...
, this design allows rapid access on and off the highway while also providing a viable alternate route in the case of accidents and traffic. In the borough of Queens, the
Van Wyck Expressway Interstate 678 (I-678) is a north–south auxiliary Interstate Highway that extends for through two boroughs of New York City. The route begins at John F. Kennedy International Airport on Jamaica Bay and travels north through Queens and ...
has this system implemented for most of its length. On Long Island, the
Long Island Expressway Long may refer to: Measurement * Long, characteristic of something of great duration * Long, characteristic of something of great length * Longitude (abbreviation: long.), a geographic coordinate * Longa (music), note value in early music men ...
(Interstate 495), has one-way service roads on each side of the expressway for most of its length from the
Queens–Midtown Tunnel The Queens–Midtown Tunnel (also sometimes called the Midtown Tunnel) is a vehicular tunnel under the East River in New York City, connecting the boroughs of Manhattan and Queens. The tunnel consists of a pair of tubes, each carrying two ...
to Riverhead.


New Jersey

While service roads are somewhat uncommon on most New Jersey highways (as they use a "
Stroad A stroad is a type of thoroughfare that is a mix between a street and a road. The word ''stroad'' is a portmanteau of ''street'' and ''road'', coined by American civil engineer and urban planner Charles Marohn in 2011, as a commentary about p ...
" design), they do exist. In northern New Jersey, Route 3 has several service roads throughout much of its length, due in part to the heavy commercial development in the area. Notably, commuters will often use these service roads to get ahead of regular traffic back ups, often causing accidents which lead to the shut down of said service roads, defeating their purpose. Frontage Roads are also used on Route 24 in Short Hills where Route 124 serves as a service road for about 2 miles. The
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 Jerse ...
also has a service road in Irvington for a distance.


New Mexico


North and South Carolina

Service roads can be found alongside interstate highways 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 ...
and
South Carolina )'' Animis opibusque parati'' ( for, , Latin, Prepared in mind and resources, links=no) , anthem = " Carolina";" South Carolina On My Mind" , Former = Province of South Carolina , seat = Columbia , LargestCity = Charleston , LargestMetro = ...
. Some of these roads have houses facing the highways which they parallel. They may also have highway service, as most of them are located near
interchanges Interchange may refer to: Transport * Interchange (road), a collection of ramps, exits, and entrances between two or more highways * Interchange (freight rail), the transfer of freight cars between railroad companies * Interchange station, a rai ...
. Most service roads in the Carolinas do not have ramps leading to and from their respective highways; rather, as mentioned before, most are located near interchanges, which allows people to exit the highway and go around to the frontage road if needed. Those service roads are also commonly used as roads for farms and their products.


Texas

As of 2007, according to the state comptroller, Texas had built over of frontage roads. This was far more than any other state. The state government's obsession with always building frontage roads alongside major highways is credited to chief highway engineer Dewitt Greer (1940–1968). He started building frontage roads as a measure to reduce right-of-way acquisition costs by ensuring access to new highways for affected landowners; otherwise, the state would have needed to pay them a higher price for cutting off access to their land. Most Texas
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 have service roads on both sides. In urban and suburban areas, the traffic typically travels one-way, in the direction of the adjacent freeway. Most other areas have two-way traffic, but as an area urbanizes, the frontage road is often converted to one-way traffic (2 lanes). In cases of freeway congestion or shutdown, the frontage road provides an instant detour, subject to delays at each stop sign or stoplight at cross streets. Where two new Texas freeways meet, especially on the edge of major metropolitan areas, the state will often first build the junctions for the one-way frontage roads—that is, four at-grade intersections—followed by an overpass where one freeway crosses over another. This requires motorists who desire to switch freeways to exit to the adjacent frontage road, turn at an at-grade intersection onto the frontage road for the other freeway, and then merge into the other freeway. As traffic increases at the at-grade intersections, the state slowly adds direct ramps between freeways for the most in-demand traffic movements, thereby reducing such inconvenience for motorists. Over 80% of
Houston Houston (; ) is the most populous city in Texas, the most populous city in the Southern United States, the fourth-most populous city in the United States, and the sixth-most populous city in North America, with a population of 2,304,580 i ...
freeways have service roads, which locals typically call feeders. Many service roads in urban and suburban areas of Texas have the convenience of
Texas U-turn A Texas U-turn, or Texas turnaround, boomerang, or loop around, is a lane allowing cars traveling on one side of a one-way frontage road to U-turn onto the opposite frontage road (typically crossing over or under a freeway or expressway). Typical ...
s, as a left lane curving under an overpass, allowing drivers to avoid stopping for traffic lights when making a U-turn. Service roads are often built as part of a multi-phase plan to construct new limited-access highways. They initially serve as a highway with access to local business before the freeway is constructed years later. After the completion of the freeway, frontage roads serve as a major thoroughfare for local activity, such as with the Katy Freeway project (I-10) in
Greater Houston Greater Houston, designated by the United States Office of Management and Budget as Houston–The Woodlands–Sugar Land, is the fifth-most populous metropolitan statistical area in the United States, encompassing nine counties along the Gulf Co ...
. In several cases, a long-range plan has called for a future freeway, but the design has either changed or the project was canceled before completion. Nicknames for frontage roads vary within the state of Texas. In Houston and
East Texas East Texas is a broadly defined cultural, geographic, and ecological region in the eastern part of the U.S. state of Texas that comprises most of 41 counties. It is primarily divided into Northeast and Southeast Texas. Most of the region cons ...
, they are called feeders. Dallas and Fort Worth area residents call their frontage roads "service roads", and "access roads" is the predominant term used in
San Antonio ("Cradle of Freedom") , image_map = , mapsize = 220px , map_caption = Interactive map of San Antonio , subdivision_type = Country , subdivision_name = United States , subdivision_type1= State , subdivision_name1 = Texas , subdivision_t ...
. Most signs reference "Frontage Road" despite local regional vernacular (there are signs in Houston that use the term "feeder"). In Houston, the free sections of
Beltway 8 Beltway 8 (BW8), the Sam Houston Parkway, along with the Sam Houston Tollway, is an beltway around the city of Houston, Texas, United States, lying entirely within Harris County. Beltway 8, a state highway maintained by the Texa ...
, SH 249 and FM 1093, not part of the Sam Houston Tollway, Tomball Tollway, and Fort Bend Westpark Tollway (respectively) are composed of frontage roads. In 2002, the
Texas Department of Transportation The Texas Department of Transportation (TxDOT ) is a government agency in the American state of Texas. Though the public face of the agency is generally associated with the construction and maintenance of the state's immense state highway system ...
proposed to discontinue building frontage roads on new freeways, citing studies that suggest frontage roads increase congestion. However, this proposal was widely ridiculed and criticized and was dropped later the same year. The
Stemmons Freeway Interstate 35E (I-35E), an Interstate Highway, is the eastern half of I-35, where it splits to serve the Dallas–Fort Worth metropolitan area. I-35 splits into two branch routes, I-35W and I-35E, at Hillsboro. I-35E travels north for , mai ...
in
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 ...
illustrates the practicability of the frontage road: the
real estate developer Real estate development, or property development, is a business process, encompassing activities that range from the renovation and re- lease of existing buildings to the purchase of raw land and the sale of developed land or parcels to othe ...
John Stemmons offered free land to the Texas Highway commission in which to build a freeway ( Interstate 35E) on the condition that the
state State may refer to: Arts, entertainment, and media Literature * ''State Magazine'', a monthly magazine published by the U.S. Department of State * ''The State'' (newspaper), a daily newspaper in Columbia, South Carolina, United States * ''Our S ...
build the freeway with frontage roads that would give access to undeveloped
property Property is a system of rights that gives people legal control of valuable things, and also refers to the valuable things themselves. Depending on the nature of the property, an owner of property may have the right to consume, alter, share, r ...
that he owned along the freeway corridor. The state was able to reduce its costs (largely the cost of land acquisition) of building the freeway, and didn't need to acquire and demolish developed property; the developer profited from development along the freeway.
San Antonio ("Cradle of Freedom") , image_map = , mapsize = 220px , map_caption = Interactive map of San Antonio , subdivision_type = Country , subdivision_name = United States , subdivision_type1= State , subdivision_name1 = Texas , subdivision_t ...
developer Charles Martin Wender used the same tactic for his Westover Hills development, offering free land through the middle of his property for SH 151 as well as paying half the costs for the initial frontage road construction. Following Wender's lead, several neighboring landowners also donated right-of-way for the route.


See also

*


References

{{Road types Road infrastructure Types of roads Limited-access roads de:Anschlussstelle (Autobahn)#Frontage Road