N.C. Gen. Stat. § 136-89.51
The Department of Transportation is authorized so to design any controlled-access facility and so to regulate, restrict, or prohibit access as best to serve the traffic for which such facility is intended. In this connection the Department of Transportation is authorized to divide and separate any controlled-access facility into separate roadways by the construction of raised curbings, central dividing sections, or other physical separations, or by designating such separate roadways by signs, markers, or stripes, and the proper lane for such traffic by appropriate signs, markers, stripes, and other devices. No person shall have any right of ingress or egress to, from or across controlled-access facilities to or from abutting lands, except at such designated points at which access may be permitted, upon such terms and conditions as may be specified from time to time by the Department of Transportation.
N.C. Gen. Stat. § 136-89.51