Maine Revised Statutes Title 29-A. Motor Vehicles § 1905-B. Brake lights

1. Requirement. All factory-installed brake lights or equivalent replacements on a motor vehicle, tiny home, trailer or semitrailer must be present and operating properly and must emit a steady red light when a slight pressure is placed on the brake pedal, and the light emitted must be visible for a distance of at least 100 feet behind the vehicle. For purposes of this section, “steady red light” means a red light that is either immediately constant and not pulsating or that pulsates for a short period and then becomes constant.

2. Vehicles used in conjunction. When a vehicle is used in conjunction with another vehicle, only the last vehicle must carry the lights required in subsection 1.

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