United States Federal Highway Administration page with a collection of various auto trail, U.S. highway, and Interstates histories, some from older FHWA publications, as well as other related information - (Read more)

Includes information about the El Camino Real de Tierra Adentro National Historic Trail, which traverses the country of Mexico and the U.S. state of New Mexico. - (Read more)

Detailed information about trail from Oregon to Missouri. - (Read more)

Guide to the old highway along the northern tier of the United States. - (Read more)

Tourism project for Cobb, Bartow, Gordon, Whitfield and Catoosa Counties in the U.S. state. Features history and maps. - (Read more)

Site covering the routing in Oregon, U.S. along the river in the general location of modern US 30 and Interstate 84. Includes activity information, pictures, postcards and ephemera scans. - (Read more)

Covers that state's portion of the road from Illinois to Maryland, U.S. Includes history and attraction listing. - (Read more)

Early plans for systems in the United States, some implemented, some not. - (Read more)

Organization focused on promoting the history of the first byway going west across America, currently known as U.S. Route 40. Includes history of the road, stories, membership details, and contacts. - (Read more)

Organization involved in preparing the 2029 celebration of the auto trail. Includes history and travel log scans of the route. - (Read more)

Gives descriptions of these auto trails with specific mention of the Pontiac Trail. - (Read more)

Contains information about U.S. 66 and the Lincoln Highway, including maps. - (Read more)

Guide to the first federally-funded road in the U.S. (1800s) and the route which followed it later (US 40). - (Read more)

A gold-rush trail cutting through the hunting grounds of the Northern Plains Indians in Montana and Wyoming, U.S. - (Read more)

Guide to this eastern U.S. highway system of the early 1900s. - (Read more)

Contains history about and photographs of the former auto trail running along the southern tier of the U.S. - (Read more)

Contains various graphics and photographs of examples from the time period such as map covers, postcards, and signs. - (Read more)

Activity page containing articles and links regarding this U.S. road, now mostly US 40. Part of an educational website about Abraham Lincoln. - (Read more)

Ancient Roman Road through the Balkan Peninsula of Europe. Includes map, links, and news. - (Read more)

Includes history of this Iowa, U.S., auto trail. - (Read more)