Maryland Transportation Section 21-704

      (a)      Unless a person has complied with this section, he may not drive or move on or across any railroad grade crossing any power shovel, derrick, roller, crawler-type tractor, or other equipment or structure that has:

            (1)      A normal operating speed of 10 miles an hour or less; or

            (2)      A vertical body or load clearance, measured above the level surface of a roadway, of less than:

                  (i)      One-half inch for each foot of the distance between any two adjacent axles; or

                  (ii)      9 inches.

      (b)      Before any person drives or moves any equipment described in subsection (a) of this section on or across any railroad grade crossing, the person shall:

            (1)      Notify an agent of the railroad of his intention; and

            (2)      Afford the railroad reasonable time to provide proper protection at the crossing.

      (c)      When the person approaches the crossing, he:

            (1)      Shall stop within 50 feet but not less than 15 feet from the nearest rail in the crossing;

            (2)      While stopped, shall listen and look in both directions along the track for any approaching or passing railroad train and for any signals indicating the approach or passage of a railroad train; and

            (3)      May not proceed until he can do so safely.

      (d)      (1)      The person may not proceed if a warning is given by an automatic signal, crossing gate, flagman, or otherwise of the immediate approach or passage of a railroad train.

            (2)      If the railroad provides a flagman, the person may proceed over the crossing only at the direction of the flagman.