Maine Revised Statutes Title 29-A. Motor Vehicles § 1905-A. Turn signal

1. Requirement. Except as provided in subsection 3, a motor vehicle, tiny home, trailer or semitrailer must be equipped with electric flashing turn signal lamps. A motor vehicle must emit white or amber light from the turn signals to the front of the vehicle and a motor vehicle, trailer or semitrailer must emit amber or red light from the turn signals to the rear of the vehicle.

2. Vehicles physically connected. When a vehicle that is being operated is physically connected to another vehicle, only the last vehicle must carry turn signals to the rear.

3. Vehicles manufactured without turn signal. Automobiles and trucks less than 80 inches in width, manufactured or assembled prior to January 1, 1953 need not be equipped with electric turn signal lamps.

4. Exception for farm tractors. This section does not apply to unregistered farm tractors.