R.I. Gen. Laws § 31-24-41: Visibility of reflectors.

Every reflector upon any vehicle referred to in § 31-24-37 shall be of a size, have characteristics, and be maintained so as to be readily visible at nighttime from all distances from fifty feet (50′) to five hundred feet (500′) from the vehicle when directly in front of lawful upper beams of head lamps. Reflectors required to be mounted on the sides of the vehicle shall reflect the required color of light to the sides, and those mounted on the rear shall reflect a red color to the rear. Violations of this section are subject to fines enumerated in § 31-41.1-4.