R.I. Gen. Laws § 31-22-20: Solicitation on roadways, permit required.

No person shall distribute literature to, request donations from, or in any other manner perform acts of solicitation of any type directed at the operator or any passenger of any motor vehicle in a travel lane, including motor vehicles stopped at intersections or in obedience to any traffic control device, or on any public street or highways within the state, without first obtaining from the city or town council of the municipality involved a permit to conduct the solicitation. Solicitation without a permit, or in violation of the terms and conditions of a permit, shall be subject to the penalties provided for by the city’s or town’s applicable code or ordinance for violations.