29-A M.R.S. §1913: Mirrors

1. Mirrors required. A person may not operate on a public way a vehicle so constructed, equipped, loaded or used that the operator is prevented from having a constantly free and unobstructed view of the way immediately to the rear, unless there is attached a mirror or reflector placed and adjusted to afford the operator a clear, reflected view of the highway to the rear of the vehicle for a distance of at least 200 feet.

2. Temporary mirrors. When a vehicle is operated without a trailer or semitrailer, temporary outside rearview mirrors must be removed or otherwise adjusted so as not to extend beyond the width of the automobile.

3. Motorcycles. A motorcycle must be equipped with a rear view mirror mounted and adjusted to afford the operator a clear, reflected view of the highway in the rear for a distance of at least 200 feet.