Improvement work on Route 321 is scheduled to resume on Tuesday and, when it does, a 32-mile detour will be in place.
The road will be closed from Route 59 in Marshburg to Sugar Bay and is expected to be closed until late July. The detour takes drivers from Route 59 to Route 219, to Owens Way, and Route 346.
Tree cutting and drainage work on the project was done in the fall.