2017 Maryland Code
Transportation
Title 21 - Vehicle Laws -- Rules of the Road
Subtitle 8 - Speed Restrictions
§ 21-803. Alteration of maximum speed limit by local authorities

  • (a) When local authority may alter specified limits. --
    • (1) If, on the basis of an engineering and traffic investigation, a local authority determines that any maximum speed limit specified in this subtitle is greater or less than reasonable or safe under existing conditions on any part of a highway in its jurisdiction, it may establish a reasonable and safe maximum speed limit for that part of the highway, which may:
      • (i) Decrease the limit at an intersection;
      • (ii) Increase the limit in an urban district to not more than 50 miles an hour;
      • (iii) Decrease the limit in an urban district; or
      • (iv) Decrease the limit outside an urban district to not less than 25 miles an hour.
    • (2) An engineering and traffic investigation is not required to conform a posted maximum speed limit in effect on December 31, 1974, to a different limit specified in ยง 21-801.1 (b) of this subtitle.
  • (b) Decreasing speed limit in school zones. -- In school zones designated and posted by the local authorities of any county:
    • (1) The county may decrease the maximum speed limit to 15 miles per hour during school hours, provided the county pays the cost of placing and maintaining the necessary signs; and
    • (2) Any municipality within each county may decrease the maximum speed limit in a school zone within the municipality to 15 miles per hour during school hours, provided the municipality pays the cost of placing and maintaining the necessary signs.
  • (c) When altered limits effective. -- An altered maximum speed limit established under this section is effective when posted on appropriate signs giving notice of the limit.
  • (d) Approval by State Highway Administration required. -- Except in Baltimore City, any alteration by a local authority of a maximum speed limit on a part or extension of a State highway is not effective until it is approved by the State Highway Administration.
  • (e) Decreasing speed limit in alleys. --
    • (1) If a local authority determines that any maximum speed limit specified in this subtitle is greater than reasonable or safe in an alley in its jurisdiction, the local authority may establish a reasonable and safe maximum speed limit for the alley.
    • (2) The local authority shall post a speed limit established under this subsection on appropriate signs giving notice of the speed limit.
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