California Department of Transportation: Caltrans is the state agency responsible for highway, bridge, and rail transportation planning, construction, and maintenance

California Highways: Gives detailed history and other information on county, state, U.S. and Interstate facilities in the state. Includes links to pages within the cahighways.org domain

Connecticut Department of Transportation: Information on public transportation, licenses, permits, publications, legal notices, traveler and road information

Connecticut Roads: Information and history about all past and present numbered routes. Includes maps, future plans, and a list of "secret" routes the state maintains but does not signpost

Florida Department of Transportation: Traveler information, roadway reports, and information on public safety

Illinois Department of Transportation: The official site of the department. Includes information on construction projects and information about doing business with the department

Illinois Highways Page: A guide to the origin and evolution of the numbered system. Includes route logs and other trivia

Indiana Department of Transportation: Official site for the transportation department. Includes profile, motorist information, and related links

Kentucky Transportation Cabinet: Information about the state's roads from the people who built them. Contains news about construction projects, the state's Six Year Road Plan, the Statewide Transportation Plan, and maps of all 120 counties

Magnolia Meanderings: A guide to the roads throughout the state

Massachusetts Highway Department: Commonly known as MassHighway. Responsible for state highways. Includes information on commuting, recycling, and traffic statistics

Michigan Department of Transportation: Official website

Michigan State Highways: Details on all of the state trunklines and their history, plus other highway facts

Missouri Department of Transportation: Official site. Contains construction project information and news

New Jersey Department of Transportation: Official page. Includes construction and proposed project information and news releases

New Jersey Route Logs: Organized by number. Includes historical information

New York State Department of Transportation: Official site. Includes frequently asked questions and detailed program, safety, research, and adopt-a-highway information

Ohio Department of Transportation: Official website

Pennsylvania Department of Transportation: Lists driver and vehicle services, traveller and construction information, and details on public safety

The Roads of Massachusetts: Shows starting and ending points for routes in state

The Upstate New York Roads Page: Descriptions of Interstate, U.S. and state routes, exit lists, and photograph and history pages

Virginia Department of Transportation: Includes real-time traffic and road conditions, construction schedules, business opportunities, agency news and services and career information

Virginia Highways Project: Includes a route log, history, and photographs