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Md. Code, Transportation § 21-1131

This is the official text of Md. Code, Transportation § 21-1131, part of Maryland’s Code, Transportation — governs vehicles, drivers, and roadways.

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§21–1131.

Official statutory text

(a) Except as provided in subsection (b) of this section, a person may not knowingly or intentionally cause a diesel–powered motor vehicle to discharge clearly visible smoke, soot, or other exhaust emissions onto another person or motor vehicle.

(b) This section does not apply to a person operating:

(1) A diesel–powered vehicle that discharges visible exhaust as the result of normal acceleration or towing;

(2) A commercial vehicle with a gross weight of 10,000 pounds or more; or

(3) A construction vehicle operating at a construction site.

Status: in_force · Read it on the official government site

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About this page: Statute text is reproduced from official government publishers via the Open US Law dataset (Vaquill AI, snapshot v2026.08, CC BY 4.0). Primary legislative text like this is public domain under the government-edicts doctrine (Georgia v. Public.Resource.Org, 2020). We link every section back to its official source so you can verify it independently.