Description and photos of former US 80 through California and Arizona including the old plank road.

Guide to this eastern U.S. highway system of the early 1900s.

Contains history about and photographs of the former auto trail running along the southern tier of the U.S.

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.

Structure built over I-80 in Nebraska, U.S., commemorating the old wagon trail. Virtual tour included.

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.

History and photographs from the ones in the western part of the state and nearby areas.

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.

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

Early plans for systems in the United States, some implemented, some not.