Vebjørn Sand explains Leonardo da Vinci's simple drawing of a graceful bridge inspired the Leonardo Bridge outside Oslo built in 2001.

History, design, and politics of the bridges that tie the San Francisco Bay Area together. From the archives of the University of California, Berkeley.

The longest bridge over ice covered waters in the world, joining Borden-Carleton, Prince Edward Island and Cape Jourimain, New-Brunswick. Multi-span concrete box girder structure.

Large digital library with statistics, drawings, and photographs.

Searchable online database of significant bridges. Based at the Department of Civil Engineering at Rice University

Guide to New York City Metro area bridges. Classified by bridge name and the waters they cross.

Offers a range of current information, historical data, and facts and figures. Length shore to shore is 17 miles.

Illustrated article by Rich Koors describes the design, construction, and maintenance. The bridge is the world's largest steel span. Located in West Virginia. Built in 1977.