Mass. Gen. Laws ch. 89, § 4E: Parking or standing of motor vehicle in a designated bus lane; penalties

Section 4E. No motor vehicle shall be parked, stood or caused to stand in a lane designated for the exclusive use of buses unless otherwise regulated or posted by an official traffic signal, sign or marking or at the direction of an authorized police officer. A violation of this section shall be punishable by a fine as established in section 2 of chapter 90K.