Before a state or state-aid highway is closed due to construction, the department shall establish a practical detour route and properly sign the route at all intersections. The detour route shall be maintained in a condition adequate to serve traffic until the state or state-aid highway under construction is opened to traffic. Upon completion of the construction project all detour signs shall be removed.

PL 1971, c. 593, §22 (AMD). PL 1975, c. 771, §251 (AMD). PL 1989, c. 108, §1 (RPR).