A trucking accident on the northbound lanes of I-495 in Massachusetts near the Mansfield exit, held up traffic in a big way on Thursday, May 3. The Mansfield Fire Department was called out to respond to a semi-truck that had crashed and was leaking diesel fuel near the Mansfield exit. The call came in around 10:36 am. Fire responders found that the truck, a 50-foot-long vehicle, had lodged itself in nearby trees, and the fuel case was cracked and leaking diesel into a nearby stream, according to Fire Chief Boldrighini.