WALTHAM, MA - Around 9:30 PM on June 9th, Waltham Fire received a call for an accident on I-95 northbound, near Route 20. Engine 4, Squad 5, Medic 1 and Ambulance 1 were dispatched. Engine 4 arrived and reported a two-car accident, one of which was on its roof. The occupants were out of the car. The accident took place at the beginning of a construction project on I-95, which may have contributed to the accident. One person was sent to Lahey Hospital.