Here is the Queensborough Bridge that connects Manhattan to Queens across the East River. Roosevelt Island is located right beneath the bridge. A cable car/tram runs parallel to the bridge but it reaches only halfway to Queens. It connects Manhattan to Roosevelt Island.
This photo shows the pedestrian and bicycle lanes on the bi-level bridge. There are 5 lanes for automobile traffic on the left behind the guard rails and an additional 4 lanes on the second level.
In the photo, you can see the original concrete structure (right) built in 1909 and the iron support structure added later in the century.