woman dies in I-93 crash in Canterbury in Massachusetts

An 82-year-old Massachusetts woman died Monday afternoon after her car rolled over on Interstate 93 in Canterbury, according to the state police.Sheila Shaw of Cambridge, Mass., was headed north to visit family when her car veered into the left shoulder, hit a large rock and rolled over several times, Trooper Joshua Beauchemin said yesterday. Beauchemin said it appeared Shaw suffered a medical problem just before the crash.Shaw was traveling alone and was pronounced dead at the scene. The accident happened at 4:42 p.m., just north of Exit 18.