North America

Georgia Roads provides information of all types about Georgia's state highway system.

Recreation, Roads and Highways, North America, United States - E-470 Tollway. The toll eastern beltway of Denver.

Unofficial guide to the Alaska highway system. Under construction as of early 2006.

Recreation, Roads and Highways, North America, United States - Maryland Department of Transportation. Traveler information and reports.

A guide to Marylandhighways, past and present. Maryland's Interstates, U.S. and state highways by route number. History and methods of route numbering in Maryland. Secret, hidden, and decommissioned state routes located and described.

Recreation, Roads and Highways, North America, United States - ReBuild California. Labor/contractor group advocating increased public investment in state infrastructure, including mass transit and highways.

Recreation, Roads and Highways, North America, United States - Friends of Southern California's Highways. A community grass-roots organization dedicated to the rebuilding and expansion of the regional freeway and thoroughfare system.

California Department of Transportation

The history of the old Ridge Route and surrounding area

Recreation, Roads and Highways, North America, United States - Advanced Highway Maintenance and Construction Technology Research Center. UC Davis and Caltrans highway research center.

Recreation, Roads and Highways, North America, United States - SigAlert.com. Includes live freeway speed maps and traffic incident summaries for many locations around the state.

Recreation, Roads and Highways, North America, United States - County Road Association of Michigan. Organization representing the interests of the state's county road agencies.