Mass. Gen. Laws ch. 160, § 163B: Passenger cars; safety windows and doors

Section 163B. No railroad corporation shall operate a passenger car manufactured after January first, nineteen hundred and seventy-nine, unless it is equipped with at least two windows on each side of said car designed to allow quick and easy egress in case of an emergency, and with access doors which shall open outward from the passenger area of the car, or which slide laterally into the wall of the car.