Squad 1 and Engine 1 were alerted for a Entrapment Crash at the intersection of Chase St. and Bowling Green Bypass just before 1500 hrs. Engine 8 and Medic 229 were added after additional information was received and unknown number of patients. Squad 1 arrived to find a single patient from an overturned van had self-extricated and additional patients were found with the second vehicle involved. One patient was transported and all units cleared within 30 minutes.