Highways of Henderson County: Contains general information and photographs.
Memphis Freeways: Historic overview.
Roadgeekery at LordSutch.com: Includes pages on many Memphis-area highways including proposed I-69 and current US 78 and State Routes 300 and 385.
Tail of the Dragon: Covers a curvy section of US 129 near the North Carolina border as well as other area roads such as the Cherohala Skyway. Includes maps and history.
Tennessee Department of Transportation: Information about state-maintained highways, driving, construction, and related topics.
Tennessee's US Highways: Route log.
The Tennessee Annex: Organized by route.