Historic Bridges of the U.S.
- Database which also contains news and images.
- http://www.bridgehunter.com/

Bridges and Tunnels
- Focuses on the East Central region. Includes forum.
- http://www.bridgestunnels.com/

National Bridge Inventory Database
- Form on a private website which retrieves information about individual structures, culled from the Federal Highway Administration National Bridge Inventory.
- http://massroads.com/nbi/

Hobbies and Diversions
- Includes Bridges Of Minneapolis/St. Paul, Bridges Of The Upper Mississippi River, Bridges Of The Lower Mississippi River, and the North American Cable Stay Bridge Registry, which consist of photographs and data.
- http://www.johnweeks.com/stuff/hobby.html

Roads and Bridges
- Various views from Boston, Massachusetts; Louisville, Kentucky; Minnesota; and Wisconsin.
- http://www.dajensen-family.com/roads/