17 Del. C. § 174

The Department may so design any controlled-access facility and so regulate, restrict or prohibit access as to best serve the traffic for which such facility is intended. In this connection the Department may 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, 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.