Maryland Code, Transportation § 21-509

(a) Except as provided in subsection (j) of this section, a pedestrian may not walk along a controlled access highway.

(b) Except as provided in subsection (j) of this section, a pedestrian may not walk on a controlled access highway.

(c) Except as provided in subsection (j) of this section, a pedestrian may not walk along a ramp leading to or from a controlled access highway.

(d) Except as provided in subsection (j) of this section, a pedestrian may not walk on a ramp leading to or from a controlled access highway.

(e) Except as provided in subsection (j) of this section, a pedestrian may not walk along an access road leading to or from a controlled access highway.

(f) Except as provided in subsection (j) of this section, a pedestrian may not walk on an access road leading to or from a controlled access highway.

(g) Except as provided in subsection (j) of this section, a person may not leave any vehicle that is on a controlled access highway.

(h) Except as provided in subsection (j) of this section, a person may not leave any vehicle that is on a ramp leading to or from a controlled access highway.

(i) Except as provided in subsection (j) of this section, a person may not leave any vehicle that is on an access road leading to or from a controlled access highway.

(j) This section does not apply to a person if an emergency prevents the movement of a vehicle in which he is riding and the person goes only to the nearest telephone or other source of assistance, nor to a person boarding or leaving a bus within a bus stop approved by the State Highway Administration.