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, for warm-up to operating temperature, and for auxiliary equipment like reefers, pumps, and lifts. The air statutes allow fines up to $25,000 a day (and up to $50,000 for repeats), but typical enforcement is warnings and much smaller citations. APU-equipped trucks get up to a 550-pound weight allowance (CGS 14-267c).
When you can keep idling
- Traffic or mechanical trouble
- Below 20F
- Heat or AC for occupant health and safety
- Reefers, pumps, lifts (PTO)
- Warm-up to the manufacturer's recommended operating temperature
- Repairs
APUs and idle-reduction gear
Auxiliary equipment and health-and-safety heat or AC are exempt, which covers idle-reduction devices. APU-equipped trucks also get a weight allowance up to 550 pounds (CGS 14-267c).
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?
How long can a truck idle in Connecticut?
What is the fine for idling in Connecticut?
Does an APU count as idling in Connecticut?
Reference information for planning, not legal advice. Traffic laws change and this can be out of date, so always confirm the current statute and obey posted signs before you rely on it. Last reviewed July 2026. Source: https://afdc.energy.gov/fuels/laws/IR?state=CT. See our Terms & Disclaimer.
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