Units were dispatched for a motor vehicle collision with patients trapped in Arcadia’s box area.  SU418 was on the original call along with apparatus from stations in Baltimore and Carroll counties.  SU418 stabilized the vehicle and removed the doors for easier access to the patient.  E412 secured the parking lot at Sportsman’s Hall on Route 30 for the Trooper.  M435 transported the patient to the landing zone and E412/M435 crews transferred the patient from the medic unit to the Trooper.