Route 40 - National Road
Guide to the first federally-funded road in the U.S. (1800s) and the route which followed it later (US 40).
Southern Highroads Trail
A designated scenic highway going through Georgia, Tennessee, North Carolina and South Carolina. Official tourism site.
The Interstate Archive
Gives information with city maps and longitude and latitude information.
The Road Information Program
Nonprofit organization promoting policies which are designed to improve traffic conditions.
The ZZYZX Interstate Highway List
Gives an overview of the system and provides a listing of all one- and two-digit routes.
Tim's Highway Page
Gives text descriptions and locator maps for various routes, primarily in Washington State.
U.S. Hwy. 90 - The Southern Route 66
Travelogue and old postcard scans. Page linked is Louisiana but there are also pages on Texas, Mississippi, Alabama, and Florida.
U.S. Route 6 Tourist Association
Covers the entirety of the route. Page includes background, news articles, and maps.
US Highways: From US 1 to US 830
Complete list including historic, plus other features.
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