Golden Bridge Manhattan New York

[Neofita]

Is it possible to make a bridge with two levels??

[rooker1]

 It is possible, just look at jeronij's Tsing Ma bridge, but no one has found a way, yet, to make both hieths functional, although I think there has been work going on to try and figure it out.

Robin

[art128]

The best way would be to use double-decked road, but this isn't out yet, nor in project so .. 

[io_bg]

First of all, this bridge isn't in New York nor it is called Golden [Gate], I assume you meant it. It's Bay Bridge is San Francisco
Second, I'd like to add that you could easily build a normal highway/avenue/road bridge, then a subway tunnel below it and the connect the subway with normal rail