Massachusetts General Law defines a pedestrian as any "person in or on any conveyance, other than a bicycle, constructed for propulsion by human muscular power, as well as ... a person on foot."
A motorist must yield, slow, or stop his/her vehicle for a pedestrian in a crosswalk who is on the same half of the way as the vehicle OR approaching from the opposite half of the way and within 10 feet of the vehicle's lane. Even if the traffic control signal indicates that the vehicle may proceed, the driver may not enter a marked crosswalk while a pedestrian is crossing.
Additionally, motorists must NOT:
Block a crosswalk
Fail to slow for a pedestrian in the roadway
Fail to stop for a blind pedestrian
Improperly pass a vehicle which was stopped for a pedestrian in a crosswalk
Open the door of a motor vehicle unless it can be done safely without interfering with the movement of other traffic, bicycles, or pedestrians.