# Transportation (GTR)

## Title 22. Vehicle Laws -- Equipment of Vehicles

### Subtitle 6. Noise Abatement Program

#### Section 22-611

(a) In this section, "engine brake" means an add-on engine compression brake for diesel engines.

(b) A person may not operate a commercial motor vehicle equipped with an engine brake unless the engine brake is connected to a properly functioning exhaust muffler system in constant operation when the vehicle's ignition is engaged.

(c) A person may not disable the exhaust muffler system of a commercial motor vehicle that is equipped with an engine brake except to make a bona fide repair or replacement.

(d) A person convicted of a violation of this section is subject to:

  (1) For a first offense, a fine of not less than $250 and not exceeding $1,000; and

  (2) For a second or subsequent offense, a fine of not less than $500 and not exceeding $1,000.

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Md. Code Ann., Transp. (as displayed at mgaleg.maryland.gov, October 16, 2026)