 Stage One began with two construction projects – the downtown subway, and the former trolley route from the newly constructed South Hills Village Station and Light Rail Maintenance Center to Castle Shannon – both ends working toward the middle section of the route.The first modern light rail cars began operation from South Hills Village to Castle Shannon on April 15, 1984 with the downtown subway added to the system on July 3, 1985.The last leg of the modern suburban "Beechview" line (from Castle Shannon to South Hills Junction via Mt.