The Fort Wayne Railroad Bridge, listed as the Pennsylvania Railroad Bridge on the National Register of Historic Places, is a double-deck steel truss railroad bridge spanning the Allegheny River in Pittsburgh, Pennsylvania.
The upper deck carries two tracks of Norfolk Southern and Amtrak traffic. The lower deck is unused. The bridge crosses 40 feet (12 m) above the Allegheny and its longest span is 319 feet (97 m).(Wikipedia)