| Highway History: 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. |
| North American Auto Trails: Catalog of auto trails from the United States and Canada in the 1910s and 1920s; includes route markers and current numbers. |
| A Few Ghostation and Ghostroad Pix: Description and photos of former US 80 through California and Arizona including the old plank road. |
| Columbia River Highway: Scans of photos from a book and transcriptions of their captions of this highway in northern Oregon. |
| Dixie Highway: Guide to this eastern U.S. highway system of the early 1900s. |
| Drive the Old Spanish Trail: Contains history about and photographs of the former auto trail running along the southern tier of the U.S. |
| El Camino Real de Tierra Adentro National Historic Trail: Management plans and interactive maps about this trail which traverses the country of Mexico and the U.S. state of New Mexico. |
| Great Platte River Road Archway Monument: Structure built over I-80 in Nebraska, U.S., commemorating the old wagon trail. Virtual tour included. |
| Historic Auto Trails of Massachusetts: History and photographs from the ones in the western part of the state and nearby areas. |
| Historic Columbia River Highway: 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. |
| Indiana's Historic National Road: Covers that state's portion of the road from Illinois to Maryland, U.S. Includes history and attraction listing. |
| Interregional Highways: Early plans for systems in the United States, some implemented, some not. |
| National Road Association of Illinois: 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. |
| New England Interstate Highways of the 1920s: Route log of the system that predated the U.S. highway system. |
| Old Spanish Trail Centennial: Organization involved in preparing the 2029 celebration of the auto trail. Includes history and travel log scans of the route. |
| On the Trail of the Named Highways from Chicago to the Southwest: Gives descriptions of these auto trails with specific mention of the Pontiac Trail. |
| Oregon Trail: The Trail West: Detailed information about trail from Oregon to Missouri. |
| Pete's Road Page: Contains articles on Northwest Indiana, U.S., roads such as the Dunes Highway, the Chicago-Detroit Post Road, and the Lincoln Highway. Includes maps. |
| Roadsidephotos.sabr.org: Contains information about U.S. 66 and the Lincoln Highway, including maps. |
| 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). |
| The Dixie Highway of North Georgia: Tourism project for Cobb, Bartow, Gordon, Whitfield and Catoosa Counties in the U.S. state. Features history and maps. |
| The Yellowstone Trail: Guide to the old highway along the northern tier of the United States. |
| Travel on the Old National Road: Activity page containing articles and links regarding this U.S. road, now mostly US 40. Part of an educational website about Abraham Lincoln. |
| Travel the Bozeman Trail: A gold-rush trail cutting through the hunting grounds of the Northern Plains Indians in Montana and Wyoming, U.S. |
| Traveling the Dixie Highway in Michigan: Photographs with descriptions from the eastern branch of the highway. |
| US-27 in Michigan: Includes some historic photographs and details about this route's former routing in the state, now supplanted primarily by US-127 and Interstate 69. |
| Via Egnatia: Ancient Roman Road through the Balkan Peninsula of Europe. Includes map, links, and news. |
Classical
