- A. A message may be displayed only while at the scene of a crash or a disabled vehicle.
- B. The message that may be displayed is “SLOW DOWN”, displayed as two lines in all upper-case letters.
C. Any tow truck-mounted portable variable messaging sign shall only display static text that:
- (1) Is colored yellow or amber, on an opaque black background;
- (2) Is one consistent letter height of at least 10 inches; and
- (3) Contains words within which the letter spacing is between 25 and 40 percent of the letter height.
- D. The vertical spacing between the lines of text shall be between 50 and 75 percent of the letter height.
- E. The message shall not include animation, flashing, dissolving, exploding, scrolling, or other dynamic display elements.
Authority: Transportation Article, §§ 22–218(c)(7) and 22–218.2(a), Annotated Code of Maryland
Effective date: March 16, 2026 (53:5 Md. R. 244)