Massachusetts General Laws Part III. Courts, Judicial Officers and Proceedings in Civil Cases (Ch. 211-262) Ch. 231, § 85L

In an action of tort for personal injuries, property damage or consequential damages caused by or arising from the operation of a motor vehicle in which the plaintiff was a passenger in the exercise of due care, the plaintiff may recover in an action against the operator upon proof that said operator was guilty of ordinary negligence resulting in said injuries or damages.