You can see a demo of this bridge here: (https://www.youtube.com/watch?v=acXb8h46aG8)
This is a concrete bridge that can be found in Newark, New Jersey. It supports the PATH train (Port Authority Trans-Hudson), a railroad that was originally created to link Newark with New York City. These types of bridges can be found near Newark PENN Station where the tracks are elevated over Amtrak and NJ Transit.