Wyo. Stat. § 31-5-503: Erection and maintenance of traffic-control devices to designate through highways.

The superintendent with reference to state highways and local authorities with reference to other highways under their jurisdiction may erect and maintain stop signs, yield signs or other traffic-control devices to designate through highways, or to designate intersections or other roadway junctions at which vehicular traffic on one (1) or more of the roadways should yield or stop and yield before entering the intersection or junction.