Does Colorado’s ‘rolling coal’ law stop drivers from pouring black smoke into the air?

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Exhaust from a truck
Business Wire
Exhaust from a diesel truck on April 20, 2018. In 2017, then-Governor John Hickenlooper signed into law a bill penalizing coal rollers. Coal rolling is when people driving cars and trucks intentionally produce black clouds of exhaust. Colorado lawmakers determined it was a road, health and safety hazard.

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Hart Van Denburg/CPR News
Republican state Sen. Don Coram on Wednesday, May 11, 2022, as the legislature wrapped up its final day of the 2022 session.



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