Maine Truck Idling Law
Maine limits commercial vehicles to 5 minutes in any 60-minute period (38 M.R.S. 585-L), with an extra 10 minutes for heat at 32F or below, no limit at all below 0F, and an unconditional sleeper-berth exemption for heat or AC during rest. Other exemptions cover maintenance and non-propulsion PTO work. A first violation is a court-adjudged traffic infraction; a repeat is a civil violation of $150 (operator) or $500 (vehicle or location owner). Idle-reduction gear also earns up to a 400-pound weight allowance.
Some figures on this page are flagged medium confidence. The limit and source are solid, but a specific fine or local detail should be confirmed with the state agency before you rely on it.
When you can keep idling
- Extra 10 minutes for heat at 32F or below
- No limit below 0F
- Occupied sleeper-berth heat or AC during rest, or while waiting to load or unload, at any temperature
- Maintenance and diagnostics
- Non-propulsion PTO work
- Traffic and uncontrollable breakdowns (file repair paperwork within 30 days)
APUs and idle-reduction gear
Non-propulsion PTO and heating exemptions cover idle-reduction devices and APUs. Maine also grants up to a 400-pound idle-reduction weight allowance for a diesel vehicle over 8,500 lbs GVWR with an EPA-certified APU (29-A M.R.S. 101, 2360).
City and county ordinances
No notable city or county idling ordinance was found for Maine in the EPA, DOE, or ATRI references. Watch local noise and parking rules.
Maine Idling Law FAQ
Is there a truck idling law in Maine?
How long can a truck idle in Maine?
What is the fine for idling in Maine?
Does an APU count as idling in Maine?
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 Traffic laws change and this can be out of date, so always confirm the current statute and obey posted signs before you rely on it.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=ME. See our Terms & Disclaimer.
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