The Quebec Bridge is a road, rail and pedestrian bridge across the lower Saint Lawrence River between Sainte-Foy (since 2002 a western suburb of Quebec City) and Lévis, Quebec, Canada. The project failed twice and took over 30 years to complete.
The Quebec Bridge is a riveted steel truss structure and is 987 m (3,238 ft) long, 29 m (95 ft) wide, and 104 m (341 ft) high.
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Cantilever arms 177 m (581 ft) long support a 195 m (640 ft) central structure, for a total span of 549 m (1,801 ft), still the longest cantilever bridge span in the world. (It was the all-categories longest span in the world until the Ambassador Bridge was completed in 1929.) It is the easternmost (farthest downstream) complete crossing of the Saint Lawrence.
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The bridge accommodates three highway lanes (none until 1929, one until 1949, two until 1993), one rail line (two until 1949), and a pedestrian walkway (originally two); at one time it also carried a streetcar line.
It has been owned by the Canadian National Railway since 1993. The Quebec Bridge was designated a National Historic Site in 1995.
According to en.wikipedia
