The DVFD along with Frankford EMS and Sussex Medic 103 was dispatched for MVC with entrapment; due to Rescue 73 out for maintenance Frankford also responded with Rescue/Engine 76-3. Initial report was 1 pt trapped and unresponsive. Amb. 76 arrived to find 1 vehicle rear ending a tractor trailer with 1 male pt and no entrapment. Eng. 73-2 arrived and secured the vehicle. D. Elliot (73-18) had Dupont Blvd command. Pt was transported to PRMC in Salisbury MD.