Massachusetts Truck Idling Law
Massachusetts limits any vehicle, trucks included, to 5 minutes of unnecessary idling (M.G.L. c. 90, 16A and 310 CMR 7.11). There is no temperature break and no sleeper-berth exemption in the statute, so this one is strict. Boston enforces it with a dedicated team. Fines are up to $100 first and up to $500 after.
When you can keep idling
- Service where the engine must run
- Deliveries needing engine power with no alternative
- Other non-movement power needs with no alternative
APUs and idle-reduction gear
The idling rule (310 CMR 7.11) has no APU clause, but auxiliary power for a non-movement need with no alternative is exempt. Massachusetts grants up to a 400-pound weight allowance for qualified idle-reduction technology / APUs (M.G.L. c. 90, 19A), with certification of the unit's weight and working condition required.
City and county ordinances
- Boston runs a dedicated idling-enforcement team (Idle-Free Boston).
Massachusetts Idling Law FAQ
Is there a truck idling law in Massachusetts?
How long can a truck idle in Massachusetts?
What is the fine for idling in Massachusetts?
Does an APU count as idling in Massachusetts?
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 Traffic laws change and this can be out of date, so always confirm the current statute and obey posted signs before you rely on it.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=MA. See our Terms & Disclaimer.
More for Massachusetts
Check Massachusetts before you roll
Live weather, closures, and hazards on one map. Free, no account.
Open Live Map →