R.I. Gen. Laws § 31-20-6: Designation of through highways — Erection of stop and yield signs.

The state traffic commission with reference to state highways, and local authorities with reference to other highways under their jurisdiction, may designate through highways and erect stop and yield signs at special entrances to them, or may designate any intersection as a stop and yield intersection and erect like signs at one or more entrances to the intersection.