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.
Detour roads and signs
23 M.R.S. § 654, under LAYING OUT, ALTERING AND DISCONTINUING HIGHWAYS.
23 M.R.S. § 654