Units were dispatched for a vehicle accident at I-70 at Ridge Rd. While enroute ECC advised units it was a single vehicle accident with a piece of metal into the windshield. AMB-129 and Chief 3 arrived on scene with all occupants still in the vehicle. Chief 3 advised no entrapment. AMB-129 checked the driver of the vehicle. A piece of metal somehow became airborne and hit the driver side windshield but did not go completely through the windshield.