Section 266:55 Mirrors.
No person shall drive upon any way any closed motor vehicle, or motor vehicle so constructed, equipped, or loaded that the driver is prevented from having a constantly free and unobstructed view of the way immediately in the rear, unless there is attached to the vehicle a mirror or reflector so placed and adjusted as to afford the driver a clear, reflected view of the way in the rear of the vehicle.
Source. 1921, 119:6. PL 103:8. RL 119:12. RSA 263:22. 1981, 146:1, eff. Jan. 1, 1982.