South Hills Junction is a station on the Port Authority of Allegheny County's light rail network. This station served as the original "merge point" of the inbound Beechview and Overbrook branches of the light rail system, just before the run under Mount Washington through the Mount Washington Transit Tunnel and into downtown Pittsburgh. In 1993 the Overbrook (Blue) Line was shut down for complete reconstruction to serve the modern-day light rail cars. During construction, it was found that a segment of track between the Boggs Ave. stop and South Hills Junction was too narrow for the larger vehicles; this was bypassed with two wide-curved rail ramps built between the Beechview (Red) Line's Palm Garden stop and South Hills Junction where the two branches now merge.
Few local residences are accessible from the station, which functions as a large transit center. In addition to serving as a transfer station for The T, a large number of bus connections are established at the site, including those that travel the South Busway, which travels on the upper level of the station.