N.C. Gen. Stat. § 20-364: Route changes.

Irrespective of the route shown on the permit, an alternate route will be followed:

(1) If directed by a peace officer.

(2) If directed by a uniformed officer assigned to a weigh station to follow a route to a weighing device.

(3) If the specified route is officially detoured. Should a detour be encountered, the driver shall check with the office issuing permit on which he is traveling prior to proceeding. (1977, c. 720, s. 9; 2004-124, s. 18.3(d).)