Portal:U.S. Roads
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Portal:U.S. Roads
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The U.S. Roads Portal

The highway system of the United States is a network of interconnected state, U.S., and Interstate highways. Each of the fifty states, the District of Columbia, Puerto Rico, American Samoa, Guam, and the U.S. Virgin Islands own and maintain a part of this vast system, including U.S. and Interstate highways, which are not owned or maintained at the federal level.

Interstate Highways have the highest speed limits and the highest traffic. Interstates are numbered in a grid: even-numbered routes for east-west routes (with the lowest numbers along Mexico and the Gulf of Mexico), and odd-numbered routes are north-south routes (with the lowest numbers along the Pacific Ocean). Three-digit Interstates are, generally, either beltways or spurs of their parent Interstates (for example, Interstate 510 is a spur into the city of New Orleans, Louisiana, and is connected to Interstate 10).

U.S. Numbered Highways are the original interstate highways, dating back to 1926. U.S. Highways are also numbered in a grid: even numbered for east-west routes (with the lowest numbers along Canada) and odd numbered for north-south routes (with the lowest numbers along the Atlantic Ocean). Three-digit highways, also known as "child routes," are branches off their main one- or two-digit "parents" (for example, U.S. Route 202 is a branch of U.S. Route 2). However, US 101, rather than a "child" of US 1, is considered a "mainline" U.S. Route.

State highways are the next level in the hierarchy. Each state and territory has its own system for numbering highways, some more systematic than others. Each state also has its own design for its highway markers; the number in a circle is the default sign, but many choose a different design connected to the state, such as an outline of the state with the number inside. Many states also operate a system of county highways.

National Forest Scenic Byway marker

Scenic byways can be designated over any classification of road in the United States. There are the National Scenic Byways, National Forest Scenic Byways and Bureau of Land Management Back Country Byways at the national level. Most states have their own system for designating byways, some more systematic than others. Indian tribes may designate byways as well.

Selected article

I-495 southbound along the Delaware River between Claymont and Edgemoor

Interstate 495 (I-495) is a 11.47-mile (18.46 km) long Interstate highway in the U.S. state of Delaware. The highway serves as a six-lane bypass of I-95 around the city of Wilmington. I-495 begins at an interchange with I-95 and I-295 near Newport to the southwest of Wilmington. From here, the road heads east to the Port of Wilmington, where it turns northeast and crosses the Christina River as it heads to the east of downtown Wilmington. Upon reaching Edgemoor, I-495 runs between the Delaware River to the east and U.S. Route 13 (US 13) to the west, continuing to Claymont. In Claymont, I-495 turns north and merges into northbound I-95 at an interchange with Delaware Route 92 (DE 92) just south of the Pennsylvania state line. Plans for a bypass of Wilmington to the east date back to 1948 and was incorporated into the Interstate Highway System in 1956. This interstate bypass was numbered I-495 in the 1960s. Construction on building I-495 took place during the course of the 1970s, with the entire length of the highway completed and opened to traffic in 1977. Between 1978 and 1980, I-95 was designated along the I-495 alignment while the South Wilmington Viaduct along I-95 was reconstructed; during this time the route through Wilmington was known as I-895. The US 13/DE 3 interchange in Edgemoor opened in 1988. In 2014, the bridge over the Christina River was closed due to tilting support columns until repairs were completed.

Recently selected: Interstate 469 • Oklahoma State Highway 132 • Interstate 235 (Iowa)

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Did you know...

Mileage sign at the western terminus of US 50

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U.S. Roads news

WikiProjects

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Nominations and votes for selected articles and selected pictures are always needed. Anyone can nominate an article, and anyone can vote for an article. You can also recommend items for Did you know?. If you have news related to U.S. roads, you can add it to the news section above.

See also popflock.com Resource: WikiProject U.S. Roads/to do, Category:U.S. road articles needing attention and individual state highway project to-do lists.

Related portals

Numbered highways in the United States

References and notes

  1. ^ Munsun, Jeff (October 3, 2019). "Exit numbers to change on Carson City Freeway beginning this weekend". Carson Now. Retrieved 2019.
  2. ^ Marusak, Joe (May 31, 2019). "First part of I-77 toll lanes finally opened Saturday. Here's what you need to know". The Charlotte Observer. Retrieved 2019.
  3. ^ Lindblom, Mike (February 4, 2019). "New tunnel? No problem? It was an easy, light-traffic day Monday on Highway 99". The Seattle Times. Retrieved 2019.
  4. ^ Smith, Jerry (January 10, 2019). "U.S. 301 Mainline toll road opens Thursday to cheers and jeers". The News Journal. Wilmington, DE. Retrieved 2019.
  5. ^ "Route 219 extension opens". The Tribune-Democrat. Johnstown, PA. November 21, 2018. Retrieved 2018.
  6. ^ Campbell, LouAnna (November 7, 2018). "Lindale relief route open, Toll 49 extended from I-20 to US Highway 69, north of Lindale". Tyler Morning Telegraph. Retrieved 2019.
  7. ^ "Hogan Administration Announces Long-Awaited US 219 Realignment Construction Project in Garrett County" (Press release). Maryland State Highway Administration. October 13, 2018. Retrieved 2018.
  8. ^ Sofield, Tom (September 22, 2018). "Decades in the Making, I-95, Turnpike Connector Opens to Motorists". Levittown Now. Retrieved 2018.
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