World Library  
Flag as Inappropriate
Email this Article
 

Alternate route

Types of special routes in the United States

An official alternate route is a special route in the United States that provides an alternate alignment for a highway. They are loop roads and found in many road systems in the United States including the U.S. Highway system and various state and county route systems. Alternate routes were created as a means of connecting a town (or towns) desired to be on a route which had been routed differently so as to put another important town or city on the route.

Originally, the term for these routes was "optional"; but in 1959, the American Association of State Highway and Transportation Officials (AASHTO) changed the designation to "alternate". In some cases where needed, an additional business route exists as a third alignment (this was the case with former U.S. Route 71 Alternate, which bypassed Joplin, Missouri).

AASHTO defines and specifies that alternate routes of the U.S. Route system should have the following behavior:

An "Alternate Route" shall be considered a route which starts at a point where it branches off from the main numbered route, may pass through certain cities and towns, and then connect back with the regular route some miles distant. Since it is the purpose of the U.S. numbered system to mark the best and shortest route available, an alternate route should be designated only where both routes are needed to accommodate the traffic demand, and when the alternate route has substantially the same geometric and structural design standards of the main marked routing. It is recommended that in case an alternate route is marked, that the shorter and better constructed route be given the regular number and the other section designated as the "Alternate Route". It is further recommended that the Highway Department erect signs at the junction points of the regular and alternate routes giving the distance between the cities or points concerned... In no instance should an alternate routing be used for the purpose of keeping an obsolete section on the U.S. numbered system after a new routing has been constructed and available to traffic.[1]

In at least one case, the banner "Optional Route" was retained when a second alternate route existed. One example of this occurred in Kansas City, Missouri with U.S. Route 40 which had an alternate and an optional route simultaneously.

In some US states, an alternate route will be designated by adding an "A" after the number instead of a sign marked "Alternate" above it. Example: "US 69A" means "US 69 Alternate".

See also

References

  1. ^ Special Route Definitions

External links

  • Media related to at Wikimedia Commons
This article was sourced from Creative Commons Attribution-ShareAlike License; additional terms may apply. World Heritage Encyclopedia content is assembled from numerous content providers, Open Access Publishing, and in compliance with The Fair Access to Science and Technology Research Act (FASTR), Wikimedia Foundation, Inc., Public Library of Science, The Encyclopedia of Life, Open Book Publishers (OBP), PubMed, U.S. National Library of Medicine, National Center for Biotechnology Information, U.S. National Library of Medicine, National Institutes of Health (NIH), U.S. Department of Health & Human Services, and USA.gov, which sources content from all federal, state, local, tribal, and territorial government publication portals (.gov, .mil, .edu). Funding for USA.gov and content contributors is made possible from the U.S. Congress, E-Government Act of 2002.
 
Crowd sourced content that is contributed to World Heritage Encyclopedia is peer reviewed and edited by our editorial staff to ensure quality scholarly research articles.
 
By using this site, you agree to the Terms of Use and Privacy Policy. World Heritage Encyclopedia™ is a registered trademark of the World Public Library Association, a non-profit organization.
 


Copyright © World Library Foundation. All rights reserved. eBooks from Project Gutenberg are sponsored by the World Library Foundation,
a 501c(4) Member's Support Non-Profit Organization, and is NOT affiliated with any governmental agency or department.