At 8:15 pm June 17th, Waltham Fire received a call for a truck roll over near Trapello Road. Engine 7 Rescue 1 and Medic 1 responded. Fire fighters could not find the accident because it was north of Trapello Road. When they arrived they found a truck on its side with the driver trapped. Fire fighters had to extricate the driver who was unconscious. He was transported to Lahey Hospital still unconscious.