See also:
 | - AARoads Roadtrips - - Contains photographic logs of various routes in the East-Central region.
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 | - American Byways - - Covers Kentucky, Ohio Tennessee, Virginia, and West Virginia and surrounding areas. Photography, historical information, and forum.
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 | - American Highway Users Alliance - - Interest group representing motor vehicle users and businesses promoting highway safety and efficiency. News updates and Rules of the Road publication information.
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 | - Bygone Byways - - Descriptions of current and former US routes 66, 80, 99, and 101 as well as other notes.
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 | - Corporate Sponsor Adopt A Highway Program - - Lists the steps which may be taken for Adopt-A-Highway Litter Removal Service of America, Incorporated to manage the section which is requested. Includes option to receive visual impressions.
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 | - Expressways Online - - Commentary and articles about relevant issues, authored by a former editor of Roads and Bridges magazine.
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 | - Gorp's Top Ten US Scenic Drives - - List which includes details on the Blue Ridge Parkway, Seward Highway, California 1, Vermont 100, and the Custer Scenic Byway.
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 | - Green Highways Partnership - - Multi-sector initiative that seeks to incorporate environmental sustainability into all surface transportation infrastructure. FAQs, media resources, and contact information.
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 | - Heartland Expressway - - A proposed divided highway running between Rapid City, South Dakota and Denver, Colorado, also known as High Priority Corridor 14 of the Intermodal Surface Transportation Efficiency Act of 1991. Maps, project status, and various other facts.
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 | - High Priority Corridors - - Information about these highways which have been set aside as most important in the 1998 bill "Transportation Equity Act for the 21st Century (TEA-21)".
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 | - Highway History - - Federal Highway Administration page with a collection of articles including those on U.S. Highway numbering and creation of the Interstate system.
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 | - Highways.TV - - Links to state transportation resources throughout the country including weather, cams, reports, and hotel reservations.
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 | - The Interstate is 50 - - American Association of State Highway and Transportation Officials page commemorating the 50th anniversary of the Interstate System in 2006. Includes history and photographs.
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 | - Interstate-Guide.com - - Includes the Interstate Guide, the List of Interstate Business Routes, and the Interstate Shield Gallery. Includes coverage.
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 | - Kim Russell's U.S. Highways Page - - Gives brief descriptions of all U.S.-numbered routes, past and present, as well as suggestions for possible future routings.
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 | - Midwestroads.com - - Covers the respective region of the country. Includes historic maps, planning documents and reports, and photos.
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 | - MotorcycleRoads.US - - Compilation of lists specifically for motorcyclists who prefer scenic or winding routes.
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 | - Multiplex Index - - Gallery of shields along roads with more than one route number.
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 | - Ports-to-Plains Trade Corridor - - Coalition to improve north-south transport in the West-Central part of the country. Maps, construction information, and contact information.
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 | - Road Stuff - - Much Northeast coverage. Also includes photos, map scans, and a log of Route 9's in the country.
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 | - Road Trip USA - - Great detail on various at-grade long-distance routes.
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 | - Roadsidephotos.sabr.org - - Contains information about certain highways culled from cross-country trips. Includes maps.
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 | - 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).
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 | - SmarTraveler - - Traffic reports for cities and other travel information.
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 | - Southern Highroads Trail - - A designated scenic highway going through Georgia, Tennessee, North Carolina and South Carolina. Official tourism site.
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 | - Summer of 6 - - Weblog of a 2006 trip documenting U.S. 6 in comments and photographs.
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 | - Traffic Counts - - List of Average Daily Traffic (ADT) tallies for major metropolitan areas.
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 | - USroadman.com - - Log of travels along U.S.-numbered routes. Includes route histories and links to photographs.
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