Mississippi Code Title 63. Motor Vehicles and Traffic Regulations § 63-3-323

(a) “Detour sign” means any sign placed across or on a public road of the state, by the state, the county or municipal authorities or by their contractors, indicating that such road is closed or partially closed, which sign also indicates the direction of an alternate route to be followed to give access to certain points.

(b) “Warning sign” means a sign indicating construction work in area.

(c) “Barricade” means a barrier for obstructing the passage of motor vehicle traffic.

(d) “Fence” means a barrier to prevent the intrusion of motor vehicle traffic.

(e) “Officially closed” means a highway or road that has been officially closed by a governmental unit, the Mississippi State Highway Department, a city or a county.

(f) “Officially opened” shall mean any highway that does not have signs or barriers stating that it is closed.