Engine 33 and medic 37 were dispatched to the area of Route 140 and Cranberry Road for a vehicle collision involving a motorcycle. While Enroute, a second medic unit was added due to numerous calls advising 2 patients. Units arrived finding a motorcycle that had struck a pedestrian with all 3 patients suffering from serious injuries. Command requested a 3rd transport unit and Engine 92 (Reese) to set up a landing site. A total of 2 helicopters were requested to fly all 3 patients to Maryland Shock Trauma.