Md. Code, Transportation § 21–708

(a) At the request of any farmer whose land is divided by a highway and who regularly drives livestock across the highway, the State Highway Administration may place a sign at approximately 500 feet from each side of the crossing, giving notice of the presence of the crossing.

(b) If livestock are being driven across the highway at the crossing, the driver of a vehicle between the two signs shall stop until the livestock have left the highway.