R.I. Gen. Laws § 31-24-10: Rear reflectors required.

Every new motor vehicle sold and operated upon a highway, other than a truck tractor, shall carry on the rear, either as a part of the tail lamps or separately, two (2) red reflectors, except that every motorcycle and every motor-driven cycle shall carry at least one reflector, meeting the requirements of § 31-24-11, and except that vehicles of the type mentioned in § 31-24-37 shall be equipped with reflectors. Violations of this section are subject to fines enumerated in § 31-41.1-4.