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20 DCMR § 900.1 states:
The engine of a gasoline or diesel powered motor vehicle, the engine of a public vehicle for hire, including buses with a seating capacity of twelve (12) or more persons, on public or private space shall not idle for more than three (3) minutes while the motor vehicle is parked, stopped, or standing, including for the purpose of operating air conditioning equipment in those vehicles.
This brochure provides information on the details, requirements and benefits of the regulation.
A printable sign and wallet-sized handout card (front and back) for "No Engine Idling" are also available.
For additional no-engine-idling information, educational materials, and posters, please visit www.turnyourengineoff.org.