Whenever it is deemed necessary, because of construction, maintenance work, or emergency, to suspend all or part of the travel on a public highway (or portion thereof) in the city, the department may, subject to the approval of the city council, restrict the use of or close such highway or portion thereof. Whenever such highway or portion thereof is so restricted or closed to travel, the department shall erect suitable barriers and notices to be posted at the point where the detour road takes off from such closed or restricted highway, and such detour road shall be clearly indicated by signs and adequately maintained. (Ord. 96-17, 6-19-1996)