Exit Numbers in The United States - Other Highways

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 U.S. Route 75 between downtown Dallas and the Oklahoma border. Similarly, the U.S. Route 54 freeway from El Paso to the New Mexico border also uses sequential exit numbering.

• Alabama only has one numbered non-interstate highway, U.S. Route 78 (future Interstate 22).

• In Arizona, many of its non-interstate freeways utilize exit numbers such as the freeway loops (Arizona State Highway 101 and Arizona State Highway 202) around Phoenix, U.S. Route 60 and Arizona State Route 51.

• In Arkansas, U.S. Route 67 and State Highway 549 are the only non-interstate freeways to have exit numbers.

• Colorado does not use exit numbers on non-interstate highways. The exception is E-470 and the Northwest Parkway, which are separate toll highways.

• In Florida, the Turnpike and other expressways owned and operated by the Florida Turnpike Enterprise use distance-number exits. Toll roads under the Orlando-Orange County Expressway Authority also use distance-number exits. The Lee Roy Selmon Expressway in Tampa uses a sequential-based exit numbering system. Expressways under the authority of the Miami-Dade Expressway Authority have no exit numbers.

• Georgia does not carry exit numbers on non-interstate expressways except for Georgia State Route 400, which runs on a sequential system, and Georgia State Route 10 Loop, running on a distance-numbers system.

• In Illinois, the Illinois Tollway system has begun numbering exits. They plan to all be numbered by the end of 2010.

• A number of small cities in Kentucky, 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:
  • Berea — KY 21, starting at the I-75 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 — US 25E, starting at the I-75 interchange at North Corbin and continuing for approximately 5 miles (8 km) until its intersection with KY 830 east of Corbin. Numbering increases as one travels east (which is signed as south on 25E).
  • London has two sets of numbered lights.
    • The Hal Rogers Parkway, 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. Numbering increases as one travels west.
    • KY 192, starting at the I-75 interchange and increasing as one travels east until reaching the Hal Rogers Parkway.
  • Manchester — US 421, starting at the Hal Rogers Parkway and increasing as one travels north through the city.
  • Middlesboro — KY 74 through the downtown area, with numbering increasing as one travels west.
  • Monticello — KY 90, starting at the northern end of the city and increasing until exiting the city.
  • Radcliff — US 31W, also known as Dixie Highway, 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.
  • Richmond also has two sets of numbered lights.
    • Business US 25 through downtown numbers lights 1-6 from KY 52 at Lancaster Avenue and the next 5 consecutive lights south. Incidentally, the lights south of the railroad tracks and north of the KY 52 multiplex are not numbered.
    • The bypass route wrapping east around Richmond starting with KY 876 (locally known as Eastern Bypass) east of I-75 exit 87, and continues onto Dr. Robert R. Martin Highway US 25/US 421 to I-75 exit 90. The traffic lights at the interstate are not numbered.
  • Somerset — 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.
• Minnesota distance-numbers its exits on Interstates, but leaves other freeways or expressways with unnumbered exits. The sole exception is US 52's freeway portion through Rochester, which received mileage-based exit numbers in 2004 as part of a major widening project.

• In Mississippi, exits from Interstate 69 and non-Interstate freeways are not currently numbered, with the exception of U.S. Highway 78/future Interstate 22, which received exit numbers as part of a signing replacement project in 2002.

• New Hampshire does not assign numbers to exits to Interstates (with the exception of I-393 in Concord, in which exit 15W from I-93 connected to the US 4/US 202 interchange prior to the construction of I-393). For example, I-293's southern exit from I-93 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 Interstate 95 in Hampton is between exits 12 and 13, but is also not numbered.

• In New Mexico, US 84/285 between Pojoaque and Santa Fe is the only non-Interstate highway that uses exit numbers.

• New England states, except for Maine (which assigned exit numbers based on mileage), post exit numbers on express highways of any significant length, regardless of designation. Occasionally, at-grade intersections have posted numbers - this can be seen, for example, on CT 9.

• In New York, all highways of this type use sequential numbering. In addition:

• All parkways on Long Island, except the Southern State Parkway, Heckscher State Parkway, and Northern State Parkway preface exit numbers with a one or two letter prefix indicating the parkway's name. For example, exits on the Meadowbrook Parkway 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.)
• Occasionally, at-grade intersections (level junctions) have posted numbers - this can be seen, for example, on the Taconic State Parkway and the Bronx River Parkway, as well as on parts of NY 27 within New York City, and parts of NY 17.
• The Taconic State Parkway numbers exits and at-grade intersections sequentially by county, with a one-letter prefix indicating the county. For example, interchanges in Westchester County are prefixed with W (e.g., W5), and interchanges in Dutchess County are prefixed with D (e.g., D10).
• The Berkshire Spur of the New York State Thruway prefaces each exit as exits B1, B2 and B3. This is due to the spur being part of the mainline ticket system, necessitating the need for the preface exit numbering and providing clear distinction from the mainline's exits 1, 2 and 3.

• Various districts within the Ohio Department of Transportation have begun to employ exit numbers on non-Interstates using the south or west entrance into the state or highway beginning as the point of origin, though at least one district measures them from the south or west entrance into the respective county.

• Oklahoma posts exit numbers on its tollway system.

• Oregon originally did not post exit numbers on any of its non-Interstate freeways. In the 1990s, the Oregon Department of Transportation began numbering most sections of its freeways with mile-based exits, starting with US-26 and OR-217 west of Portland. Now, almost all freeway interchanges in Oregon are numbered, and new interchanges built are given numbers. Note that exit numbers are based on internal highway mileage, not posted route mileage; see State highways in Oregon for an explanation on the difference between the two.

• Pennsylvania's non-Interstate highways that have numbered exits are still numbered sequentially, with the exception of the toll roads that are part of the Pennsylvania Turnpike system. PA 60 was one of these roads, but the numbers were converted to the mileage-based system (and reversed) starting in November 2009 when I-376 was extended along PA 60 to Mercer County. The Pennsylvania Turnpike Northeast Extension, opened in 1957, originally had a unique system in which the mileposts were separate from that of the mainline turnpike, starting at milepost A0.0 (the mainline turnpike went from 0 to 359), but used the sequential exit numbers 31 to 39 (the mainline turnpike went from 1 to 30). Upon the conversion to the mile-based system, the mainline turnpike uses the distance of I-76 from the Ohio state line to New Jersey (as I-276), while the Northeast Extension was converted in 2000-2003 using the mileage based on the southern junction of I-476 (with I-95 in Chester), with the southernmost Northeast Extension exit being numbered as Exit 20, using the I-476 mileage instead of Exit 333A or Exit 334 on the east–west mileage, thus making the highways separate, but distinct systems despite the use of the common ticket system. Additionally, freeway sections can have independent mileposting 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. Conversely, the US 22 Lehigh Valley Thruway through Bethlehem has no exit numbering, but does have mileposts that reflect the appropriate distance from the state line.

• Tennessee generally does not post exit numbers on its non-Interstate freeways, with the exception of Nashville's two non-Interstate partial beltways: TN 155 (Briley Parkway) and TN 840.

• Vermont does not use the mileage-based system. There are 2 exceptions: VT 127 and VT 289 around Burlington. 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 near Williston.
• Washington State does not number most of its non-Interstate freeway exits. Two exceptions are SR-14 from Vancouver to Camas (since the 1990s) and SR-16 from Tacoma to near Gig Harbor (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 has only one non-interstate with exit numbers, the US 22 freeway in Weirton.

• Wisconsin has exit numbers on the freeway and expressway portions of US 12 WIS 16, WIS 29, WIS 64, US 41, US 45, US 51, US 53, WIS 145 and US 151.