This view of the Southside is from Grandview Avenue on Mt. Washington. The bridges (from bottom) are light rail transit, Liberty, 10th Street and Birmingham. The bottom three all lead to tunnels. The first two on their south ends and the 10th St to the city side Armstrong Tunnel across 2nd Ave.
This photo actually looks north to the Fort Duquesne Bridge with the ramp from the Fort Pitt Bridge in the foeground. A pedestrian walkway from the Point to the North Shore (at top) runs along the near side of the bridge.