Rolling coal is the practice of deliberately modifying a diesel engine, often by removing its particulate filter or adding smoke switches and oversized exhausts, so that it emits large plumes of black or gray soot-laden exhaust on demand. Practitioners often use it as a form of anti-environmentalist protest, and because the modifications typically defeat legally required emissions controls, the practice is illegal in jurisdictions with clean air laws, in addition to reducing the vehicle's fuel economy.
Facts
Typical PenaltyConnecticut: fine up to 1000 dollars or up to thirty days imprisonment, or both 1 Notable Example2021 Waller County, Texas incident in which a 16-year-old rolling coal ran over six bicyclists 1 Classification
Offense GradeMinor or Summary Offense 1 Connections
Has Offense Grade
Entity-backed identity for the offense-grade enum value this offense already carries, resolved to a crime concept by an explicit value-to-entity map (phase 3 bucket conversion, docs\design_entity_backed_browse_buckets_20260928.md). The offense-grade fact itself stays on the offense unchanged.
Sources
1. Rolling Coal (Wikipedia)
Wikipediaen.wikipedia.org/wiki/Rolling_coal, lead paragraph
Rolling coal is used as a form of anti-environmentalism protest.
Legislation section, Connecticut HB-6975
Any person who violates the provisions of this subdivision shall be fined not more than one thousand dollars or imprisoned not more than thirty days, or both.
Texas 2021 incident paragraph
In 2021, six bicyclists training for a road race were run over by a 16-year-old who was rolling coal along Business U.S. Highway 290 in Waller County, Texas, outside Houston, when he attempted to drive ahead of the group to engulf them in the exhaust.
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