Around 915pm, company 5 was dispatched for a collision in the 1100 blk of Jefferson Pike. C19-1 arrived with a single vehicle crash, over turned and on fire. Upon investigation, all occupants were out of the car and C19-1 had command. It was determined the vehicle left the roadway and hit 2 trees and a fence, then flipped on it's roof and caught fire. A total of 4 patients were treated, 2 serious and 2 minor. RE52's crew pulled a line to extinguish the fire and confirm that everyone was out of the vehicle.