Updated at 4:48 p.m. July 12: Sandra Ouellette, the driver, is the mother of Angel Pina.
Updated at 2:15 p.m. July 12: The 12-year-old girl has been identified as Angel Pina who was scheduled to start at Norton Middle School in September.
The three victims in on Route 24 northbound on the Stoughton/Avon line are from Norton, according to Trooper Todd Nolan, a spokesperson for the Massachusetts State Police.
A 12-year-old girl was pronounced deceased at the scene of the crash, which took place shortly before 5 p.m. on July 12.
Sandra Ouellette, 36, was the operator of the vehicle, a 2004 Chevy Colorado, Nolan said.
The car rolled over about a quarter mile south of exit 20 (Route 139). The three victims were found lying on the highway when emergency response crews arrived, the Boston Herald reported.
Ouellette was transported to Massachusetts General Hospital with serious injuries, but is expected to survive, Nolan said.
An update on her condition was not available.
The other passenger, Stephanie Rogers, 21, was transported to Boston Medical Center with non-life-threatening injuries.
A BMC spokesperson said Rogers is listed in "good" condition.
The State Police are not commenting on whether or not the three victims are related.
The official cause of the crash has not been determined, Nolan said, although State Police believe it may be due to a tire blowout.
It is undetermined at this time if the three victims were wearing seat belts, Nolan said.
The accident created gridlock on both sides of Route 24 during the evening commute. At one point, traffic was backed up to Route 495 on the northbound side, WBZ reported. The highway reopened Thursday evening, according to the Massachusetts Department of Transportation.