Md. Code, Transportation § 25–109

The State Highway Administration, as to both State and county highways, and any local authority, as to any other highways under its jurisdiction, may:

(1) Designate through highways and place stop signs or yield signs at specified entrances to them; or

(2) Designate any intersection as a stop intersection or as a yield intersection and place stop signs or yield signs at one or more entrances to the intersection.