Canton and N Franklin Fire Companys were initially sent to an accident w/ injuries and possible entrapment. Then Claysville and Taylorstown Fire Companys were sent since there was the possibility this was on three township borders. Chief 52 was on scene 1st did a size-up and called for a 2nd EMS unit with 4 patients injured but all were out of the vehicles. Crews from Ambulance & Chair along with all the fire depts. cared for four patients. ACS requested a 3rd ambulance because of the severity of injuries. Air medical transport was requested for 2 patients to be flown to Allegheny General Hospital. While N Franklin landed Life Flight and Stat at West Penn Wire, while Canton, Claysville and Taylorstown handled the patient care, accident scene, clean up and directed traffic. Pa. State Police requested the roadway be shut down, traffic was diverted for about 1 hour.