At 0718 hrs. Rescue 3 & Engine 33 were alerted to assist Station 4 on an MVA with entrapment at Rt.301 & Rt.304. Originally dispatched as a local rescue box, PM 400 arrived confirming a tractor trailer vs car with entrapment. Box was then upgraded to a rescue assignment, alerting Rescue 3 & Engine 33. Rescue 3 arrived on location and assisted Station 4's crew with extrication. Driver of the car was flown by MSP Trooper 6 to Shock Trauma & tractor trailer driver was transported to local facility. Officer 408 (Kiel) had command.