Boston Bus Company Settles Idling Pollution Suit for $5.6 Million
The company settled a citizen-enforcement Clean Air Act case after bus engines were left running in Boston neighborhoods, and the law limits idling to five minutes.
- A bus company agreed to pay US$5.6 million to settle a citizen-enforcement lawsuit in Boston, resolving violations of a Massachusetts law that limits vehicle idling to five minutes.
- Vehicle emissions contributed to nearly 42,000 deaths in the United States in 2024, as idling engines release pollutants that accumulate locally and pose severe health risks including cardiovascular damage.
- Idling consumes more than 6 billion gallons of fuel annually, costing consumers and businesses more than US$20 billion, though research shows turning off engines saves fuel after about 10 seconds.
- Chicago issued only about 800 citations over 15 years under its anti-idling ordinance, while New York City incentivizes citizen reporting by offering one-quarter of assessed fines to enforcement participants.
- A group of bus companies filed a federal lawsuit in May 2026 alleging that local anti-idling laws violate the Constitution, claiming these programs impede interstate commerce and conflict with federal safety regulations.
13 Articles
13 Articles
The Independent
The Independent (US)The cost of leaving your vehicle’s engine running
Idling a vehicle does not help an engine last longer than turning it off and on frequently
Leaving vehicle engines idling is unhealthy, expensive – and often illegal - The Mexico Ledger
A bus company that left its buses’ engines running while parked in Boston neighborhoods has settled a lawsuit by agreeing to pay US$5.6 million in damages for the resulting air pollution. The settlement came in a citizen-enforcement lawsuit under the Clean Air Act, which allows any person to sue alleged polluters for the harm done to human health and the environment. The case was based on a Massachusetts law that limits vehicle idling to no more…
Leaving vehicle engines idling is unhealthy, expensive – and often illegal - Seward Independent
A bus company that left its buses’ engines running while parked in Boston neighborhoods has settled a lawsuit by agreeing to pay US$5.6 million in damages for the resulting air pollution. The settlement came in a citizen-enforcement lawsuit under the Clean Air Act, which allows any person to sue alleged polluters for the harm done to human health and the environment. The case was based on a Massachusetts law that limits vehicle idling to no more…
The Conversation
Leaving vehicle engines idling is unhealthy, expensive – and often illegal
When a vehicle is stopped but the engine is running, it's still burning gas and emitting pollutants. AP Photo/Rick BowmerA bus company that left its buses’ engines running while parked in Boston neighborhoods has settled a lawsuit by agreeing to pay US$5.6 million in damages for the resulting air pollution. The settlement came in a citizen-enforcement lawsuit under the Clean Air Act, which allows any person to sue alleged polluters for the harm …
Leaving vehicle engines idling is unhealthy, expensive – and often illegal - Hillsboro Sentry Enterprise
A bus company that left its buses’ engines running while parked in Boston neighborhoods has settled a lawsuit by agreeing to pay US$5.6 million in damages for the resulting air pollution. The settlement came in a citizen-enforcement lawsuit under the Clean Air Act, which allows any person to sue alleged polluters for the harm done to human health and the environment. The case was based on a Massachusetts law that limits vehicle idling to no more…
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