Maryland Transportation Section 21-1113

      (a)      A person may not place any structure, building, or vehicle on a highway to sell or display any produce or merchandise if it constitutes a traffic hazard.

      (b)      In Prince George's County, a person may not sell or display any produce or merchandise on State highways in a manner that constitutes a traffic hazard.

      (c)      On the order of any police officer, the person shall:

            (1)      Remove the structure, building, or vehicle described under subsection (a) of this section; or

            (2)      Cease any activity prohibited under this section.