National Highway System (United States) (English Wikipedia)

Analysis of information sources in references of the Wikipedia article "National Highway System (United States)" in English language version.

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Federal Highway Administration. "Interstate FAQ: Why don't you put metric speed and distance signs on the Interstate System?". Celebrating the Eisenhower Interstate Highway System. Federal Highway Administration. Retrieved August 23, 2008.
Natzke, Stefan; Neathery, Mike & Adderly, Kevin (September 29, 2017). "What is the National Highway System?". National Highway System. Federal Highway Administration. Retrieved January 29, 2019.
Federal Highway Administration (November 7, 2014). "Chapter 18: Strategic Highway Network (STRAHNET)". Status of the Nation's Highways, Bridges, and Transit: 2004 Conditions and Performance. Federal Highway Administration. Retrieved August 27, 2015.
Natzke, Stefan; Neathery, Mike & Adderly, Kevin (April 6, 2018). "Intermodal Connectors". National Highway System. Federal Highway Administration. Retrieved January 29, 2019.

Slater, Rodney E. (Spring 1996). "The National Highway System: A Commitment to America's Future". Public Roads. 59 (4). Washington, DC: Federal Highway Administration. ISSN 0033-3735. Retrieved July 9, 2012.

Cox, Wendell (January 22, 2011). "China Expressway System to Exceed US Interstates". New Geography. Retrieved July 9, 2012.

Pub. L. 102–240: Intermodal Surface Transportation Efficiency Act of 1991 §2. Declaration of policy: Intermodal Surface Transportation Efficiency Act

Slater, Rodney E. (Spring 1996). "The National Highway System: A Commitment to America's Future". Public Roads. 59 (4). Washington, DC: Federal Highway Administration. ISSN 0033-3735. Retrieved July 9, 2012.