Md. Code, Transportation § 21–1401

(a) In this subtitle the following words have the meanings indicated.

(b) “Approach” means any roadway, overhead structure, ramp, bridge, causeway, entrance, and exit provided as a means of access to or departure from an Authority highway.

(c) “Authority highway” means:

(1) Each highway, tunnel, and bridge within the jurisdiction of the Maryland Transportation Authority; and

(2) Each approach to these highways, tunnels, and bridges.

(d) “Bridge” means any bridge within the jurisdiction of the Maryland Transportation Authority.

(e) “Tunnel” means:

(1) The Baltimore Harbor Tunnel; and

(2) Any other tunnel within the jurisdiction of the Maryland Transportation Authority.