In road transportation, an auxiliary route is either a spur or a loop of a parent route. The auxillary route, sometimes called a "child route", is typically distinguished from its parent with either a specific numbering scheme (e.g. Interstate 240 is an auxillary route of Interstate 40 in the United States) or the use of banners like "Business", "City", "Alternate", "Spur", and "By-pass". Disruptions in organized traffic flow can create delays lasting hours. ... A spur route in the United States Interstate highway system refers to a branch off of a primary interstate that connects with a destination away from the primary interstate. ... A loop route is a highway or other major road that extends out from a typically longer, more important parents road to enter and (usually) circle a large city. ... A road number is a number assigned to a stretch of road, or of a long distance route. ... There are three Interstate highways designated Interstate 240 in the US. North Carolina Oklahoma In Oklahoma, I-240 runs 16. ... Interstate 40 (abbreviated I-40) is a major west-east interstate highway in the United States. ... A bannered highway is an alternate route or spur designated with a banner plate above (or occasionally below) the route shield, or a suffix after the number in the shield of U.S. Highways and state highways. ... A Business Route can be a branch from an Interstate, U.S. or State Highway route. ... The examples and perspective in this article or section may not represent a worldwide view. ... Alternative routes vary widely in quality. ... A spur route in the United States Interstate highway system refers to a branch off of a primary interstate that connects with a destination away from the primary interstate. ... Bypass routes are a type of bannered highway usually used when the main route of the highway goes through a town and an alternate route of the same highway goes around the highway. ...
Oftentimes the term "spur" is used as a substitute for "auxiliary", but true spurs have a unique characteristic in that they do not normally reconnect to the parent highway once separated.
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