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Idling Law No. CT Statewide limit

Connecticut Truck Idling Law

Connecticut limits idling to 3 consecutive minutes (R.C.S.A. 22a-174-18, enforced by DEEP). It is waived below 20F, for heat or AC needed for the occupant's health and safety, and for auxiliary equipment like reefers, pumps, and lifts. The air statute allows fines up to $5,000 a day, but typical citations are much smaller.

Statewide lawYes
Limit3 consecutive minutes
FineUp to $5,000 per day on paper; usually far less
StatuteR.C.S.A. 22a-174-18
01 Exemptions

When you can keep idling

02 APUs

APUs and idle-reduction gear

Auxiliary equipment and health-and-safety heat or AC are exempt, which covers idle-reduction devices.

03 Local rules

City and county ordinances

No notable city or county idling ordinance was found for Connecticut in the EPA, DOE, or ATRI references. Watch local noise and parking rules.

Connecticut Idling Law FAQ

Is there a truck idling law in Connecticut?
Yes. Connecticut enforces a statewide idling limit on commercial diesel trucks: 3 consecutive minutes. See the statute and exemptions below.
How long can a truck idle in Connecticut?
3 consecutive minutes. See R.C.S.A. 22a-174-18.
What is the fine for idling in Connecticut?
Up to $5,000 per day on paper; usually far less.
Does an APU count as idling in Connecticut?
Auxiliary equipment and health-and-safety heat or AC are exempt, which covers idle-reduction devices.

This page is reference information for planning, not legal advice. Idling rules change and many are local. Confirm the current rule with the state environmental or transportation agency before you rely on it. Source: https://afdc.energy.gov/fuels/laws/IR?state=CT.

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