Where the facts come from
Every sourced sentence on this site was checked against a downloaded excerpt of the page or document listed here, on 15 November 2026.
- U.S. National Park Service, Route 66: National — checked 15 November 2026.
- U.S. National Park Service, Route 66 overview / history — checked 15 November 2026.
- U.S. Bureau of Land Management, California Route 66 map and guide — checked 15 November 2026.
- Federal Highway Administration, Route 66 fact sheet — checked 15 November 2026.
- Illinois Digital Heritage Hub, Historic Route 66 in Illinois: Legacy — checked 15 November 2026.
Photographs are listed separately on the credits page. All of them are public-domain work by Carol M. Highsmith in the Library of Congress.
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