Maryland Code, Transportation § 21-1114

(a) A person may not drive on any new roadway or newly repaired roadway before it is opened to traffic.

(b) A person may not walk on any new roadway or newly repaired roadway before the roadway is opened to traffic.

(c) A person may not willfully injure or damage any highway, including a highway under construction.

(d) A person may not willfully injure or damage any work, material, or structure used in connection with the construction of a highway.