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- 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.
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- Bridgepix.com - - Contains photographs and scans of other media of subjects worldwide.
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- The Bridges Project - - Online database of significant bridges compiled by the Department of Civil Engineering at Rice University. Includes photographs.
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- International Peace Highway Project - - International Highway Construction Corporation, supporters of a highway system connecting most of the world which would include a Bering Strait bridge and Japan-South Korea tunnel.
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- A Span For All Seasons - - A collection of photographs of facilities and a large worldwide inventory of suspension bridges.
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- The Tunnel Page - - The longest road and rail tunnels in the world, grouped by categories such as sub-sea tunnels and immersed tubes.
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