Federal-aid highway program

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The U.S. federal-aid highway program was commenced in 1916, with milestones of Federal-Aid Highway Act of 1944 and Federal Aid Highway Act of 1956.[1]

The federal-aid highway system consists of three parts:

  • The Interstate Highway System (FAI routes)
  • The Federal-aid primary highway system (FAP system) is a system of connected main highways, selected by each state highway department subject to the approval of the Bureau of Public Roads. It encompasses routes of the Interstate System and other important routes serving essentially through traffic with their urban extensions, including important loops, belt highways, and spurs.[1]
  • The Federal-aid secondary highway system (FAS system) consists of the principal secondary and feeder routes including farm-to-market roads, rural mail and public school bus routes, local rural roads, county and township roads, roads of the county, road class, and their urban extensions. These roads are chosen by the state highway departments and appropriate local road officials cooperatively, subject to approval by the Bureau of Public Roads.[1]



  1. ^ a b c Public Domain One or more of the preceding sentences incorporates text from this source, which is in the public domain: Smith, Wilber E. (October 1958). "The Federal Urban Highway Program". Illinois Municipal Review. Springfield, Illinois: Illinois Municipal League: 227–230. ISSN 0019-2139. Retrieved February 7, 2016.
  2. ^ "Federal-aid Essentials for Local Public Agencies". Federal-aid Highway Program. US Department of Transportation. Retrieved 15 April 2015.