At 0656 hrs Station 3 and Station 4 were alerted for an MVA with entrapment on Rt.18 @ White House Farm Lane in the 3-12 Box. Rescue 3, Engine 33 and Engine 32 responded. Rescue 3 arrived to find a 2 vehicle MVA head on. FF J. King on Rescue 3 established command. One vehicle was overturned and unoccupied. The other vehicle was off the roadway with one priority 4 person trapped. Command cancelled Rescue 4 and Engine 32. Engine 33 established the landing zone for Trooper 6. Rescue 3 remained on location to assist the State Police and the Forensic Investigator. Rescue 3 cleared the call at 0932 hrs.