Page "Bridge" Paragraph 45

Double-decked or double-decker bridges have two levels, such as the San Francisco – Oakland Bay Bridge, with two road levels.

Tsing Ma Bridge and Kap Shui Mun Bridge in Hong Kong have six lanes on their upper decks, and on their lower decks there are two lanes and a pair of tracks for MTR metro trains.

Some double-decker bridges only use one level for street traffic ; the Washington Avenue Bridge in Minneapolis reserves its lower level for automobile traffic and its upper level for pedestrian and bicycle traffic ( predominantly students at the University of Minnesota ).

Likewise, in Toronto, the Prince Edward Viaduct has five lanes of motor traffic, bicycle lanes, and sidewalks on its upper deck ; and a pair of tracks for the Bloor – Danforth subway line on its lower deck.