No common carrier of passengers shall, by rule, regulation, sign or otherwise, require passengers whom it suffers to enter, or leave by, a door of its car or train, to do so at their own risk; and no such passenger shall be prevented from recovering compensation in damages for any injury by reason of any such rule, regulation, sign or requirement.
Mass. Gen. Laws ch. 159, § 3
Limitations upon liability imposed by carrier
Official source: Massachusetts Legislature. Reproduced from public-domain Massachusetts statutes; confirm against the official source for the current text. Not legal advice.