| 2. | The Tunnel Page | | | The longest road and rail tunnels in the world, grouped by categories such as sub-sea tunnels and immersed tubes.
home.no.net |
| 4. | Bridge of the Month Quiz | | | An image is posted inviting entrants to identify the feature. A free copy of a book on the subject is awarded to one correct entrant per month.
www.bridgeink.com |
| 5. | The Bridges Project | | | Online database of significant bridges compiled by the Department of Civil Engineering at Rice University. Includes photographs.
128.42.22.5 |
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