UPDATE, 6:39 p.m. The accident has been cleared from the scene and traffic is reportedly back to normal.
A number of emergency response alerts are warning of a motor
vehicle accident on I-498 South near the off-ramp to Boston Road.
Massachusetts State Police and other police are at the scene and reporting that at least one vehicle “flipped multiple times” by the off-ramp. Two cars are reportedly in the median. Everyone is out of the vehicle but injuries are unknown at post time.
Westford Patch will update this post when more information becomes available.