River Other bridges This table lists some other major bridges within the City of Pittsburgh limits. Notable bridges The Fort Pitt Bridge is a steel bowstring arch bridge that spans the Monongahela River near its confluence with the Allegheny River at the point. It carries Interstate 376 between the Fort Pitt Tunnel and Point State Park. The Fort Duquesne Bridge is a steel tied arch bridge that spans the Allegheny River in Pittsburgh. It carries Pennsylvania Route 65 / Interstate 279 (North Shore Expressway), which runs through Downtown Pittsburgh's Golden Triangle towards Interstate 79. The West End Bridge is a large steel bowstring arch bridge which crosses the Ohio River. It is the first bridge on the Ohio River heading toward the Mississippi River. The bridge carries U.S. Route 19. The Liberty Bridge crosses over the Monongahela River, joining Interstate 579 at its southern terminus. The Three Sisters are three parallel, nearly identical self-anchored suspension bridges that cross the Allegheny River at 6th, 7th, and 9th streets. The bridges have been recently renamed for prominent Pittsburgh residents: Roberto Clemente Bridge, Andy Warhol Bridge, and Rachel Carson Bridge. The Smithfield Street Bridge is a lenticular truss bridge crossing the Monongahela River. Its two main lenticular spans make the bridge very recognizable. It is a National Historic Civil Engineering Landmark, according to a plaque on the bridge. See also List of tunnels in Pittsburgh Crossings of the Ohio River in Pennsylvania Crossings of the Allegheny River in Pennsylvania Crossings of the Monongahela River in Pennsylvania List of bridges and tunnels in New York City References External links Allegheny County entry at Historic Bridges Bridges in Pennsylvania Pittsburgh-related lists