While on standby at Blair Station 50 (Allegheny Township Fire) Rescue Engine 71 was alerted to a Motor Vehicle Accident (MVA) with entrapment in the area of Route 22 West and 764 off ramp in Allegheny Township. Rescue Engine 71 responded to find one vehicle on its roof with two confined patients. Personnel quickly stabilized the vehicle and gained entry to access the patients. Personnel from Blair Station 86 (Blue Knob Fire) assisted with stabilization and patient removal. Both patients were transported to the hospital by EMS. Pennsylvania State Police were investigating the accident. Rescue Engine 71 cleared the scene and returned to Blair 50's station for standby until released.