BFD responded to a call for a report of a large tractor trailer that flipped inside the Ted Williams tunnel at the Congress Street exit on Tuesday morning around 6am.
According to NBC10 Boston, the truck was heading westbound on the Mass Pike when it rolled over at the exit 135 on-ramp. The exit 135 on-ramp to Interstate 93 north and south is closed. The Congress Street ramp to I-93 north and south is also closed.
Commuters should expect delays. State police were also on scene.