Police are looking for whoever tossed a rock onto a car driven by a great grandmother on I-495 on Friday afternoon.
Yingzi Wang was behind the wheel of a minivan when the truck, hauling a backhoe on a trailer, drove past her on Route 495 southbound in Southboro.
Brian Fuller of Milford was involved in an accident early Wednesday morning, and has succumbed to his injuries.
Authorities are investigating why National Grid sent a potentially dangerous truck hauling heavy equipment on a test drive that ended in a fatal crash.
The Prudential Tunnel on the Massachusetts Turnpike in Boston has reopened after a crash involving two tractor-trailers.