Maryland Transportation Section 21-1125
§ 21-1125.
CAUTION: READ FULL TEXT OF SECTION FOR SPECIAL NOTE
** SPECIAL NOTE: EFFECTIVE - JANUARY 1, 2006 - CHAPTER 366 - 2005 **
  Notwithstanding any other provision of this title, a person may not drive a low speed vehicle:
    (1)   On a highway for which the posted maximum speed limit exceeds 30 miles per hour;
    (2)   On an expressway or another controlled access highway that is signed in accordance with § 21-313 of this title;
    (3)   On a highway on which driving a low speed vehicle is prohibited by a county or municipal ordinance; or
    (4)   Across a highway for which the posted maximum speed limit exceeds 45 miles per hour, except at an intersection that is controlled by:
      (i)   A traffic control signal; or
      (ii)   A stop sign at each approach to the intersection.