Nationwide Interstate Links
Connects to the respective Interstate portions of other websites.
http://members.aol.com/utahhwys/intlinks.htm

Andy's Highway Kickoff Page
Large list with annotations.
http://www.aaroads.com/kick-off/highway.html

Roadfan Locator
Listing of people interested in the subject, with contact information. Organized by geographic area.
http://www.roadfan.com/roadfan.html

California Highways: Other Links
Links to resources covering many countries.
http://www.cahighways.org/othlinks.html

Tony's Exit List Collection
Contains exit lists for all 2-digit and most 3-digit Interstates, sorted by state and/or city.
http://www.geocities.com/tonygrahamvirtualdrive/virtualinterstatetour

Google Co-op Custom Search Engine - Road Search Engine
Searches within selected relevant sites.
http://google.com/coop/cse?cx=002901626849897788481:cpnctza84gq