the others go straight up. Kelowna (interior BC) has a floating bridge with a tilt-up span as well. These things are dangerous becaues the road bed on the tilting section is open mesh steel, like a seive. Two wheeled vehicles tend to "squirm" when crossing them.
Here's another [link|http://urbanlegends.about.com/library/bl_water_bridge.htm|amazing bit of engineering].