Montgomery County, MD Noise from Specific Sources: Car Alarm Limits (2026)

Sounding a horn or other signaling device on any motor vehicle on private property except:

(A) in an emergency; or

(B) as a danger warning signal during daytime hours if the device complies with noise level limits.

(2) Operating a sound-producing device on public streets for commercial advertising or to attract public attention.

(3) Selling anything by outcry.

(4) Loading, unloading, opening, closing or otherwise handling containers, building materials, construction equipment, or similar objects.

(5) Operating a device that produces, reproduces, or amplifies sound.

(6) Allowing an animal to create a noise disturbance.

(7) Operating power equipment mounted on a motor vehicle or operating other devices powered by a generator or a motor vehicle. (1996 L.M.C., ch. 32, § 1; 2011 L.M.C., ch. 7 , § 1.)

Editor’s note —See County Attorney Opinion dated 10/6/00 indicating that long-term parking on public streets is prohibited in certain circumstances, but not based on the size of the vehicle. See County Attorney Opinion dated 3/16/92 explaining that the Washington Metropolitan Area Transportation Authority (esp. Metrorail) is subject to the County’s noise control law, although an exemption may be obtained if it is in the public interest.