A triaxle truck carrying 23 tons of gravel overturned at a bend in the road of Route 228, east of Route 8, near West Industrial Drive in Middlesex Township about 1 p.m. Tuesday. The accident left the driver trapped in his vehicle for a time until volunteer firefighters could assist him in getting out. He was taken to Butler Memorial Hospital as a precaution. The vehicle owned by an Ohio trucking company was en route to Victory Road Industrial Park with the gravel, according to Middlesex police. The accident closed one lane of Route 228.