Cambridge, MA Environmental Rules: Vehicle Idling Restrictions (2026)
Key Facts
- Local citation
- Cambridge Municipal Code §10.17.100
- Adopted
- Ord. 1139, 1992
- Reporting deadline
- 2 months, to City Manager
- State cap enforced
- 5 minutes, G.L. c.90 §16A
- State penalty
- $100 first offense, $500 repeat
- Vehicles covered
- buses, trucks, taxis, automobiles
- Local enforcer
- Cambridge Police Department
Summary
Cambridge doesn't write its own idling clock into the General Code: state law already caps unnecessary engine idling at five minutes. Municipal Code Section 10.17.100, part of the city's 1992 vehicle trip-reduction ordinance, orders the Police Department to actively enforce that state cap on buses, trucks, taxis and automobiles and report back to the City Manager.
The Police Department shall promptly review and improve its enforcement of the statutory prohibitions against idling by busses, trucks and taxis and automobiles set forth at G.L., ch. 90, § 16A. Within two months of the effective date of the ordinance codified in this provision, the Commissioner of the Police Department shall report to the City Manager on the Department's implementation of this provision.
Full Breakdown
17, Cambridge's 1992 ordinance responding to state and federal Clean Air Act conformity requirements for reducing vehicle trips and emissions. 90, Section 16A, and required the Police Commissioner to report to the City Manager on implementation within two months of the ordinance taking effect in 1992. The state statute the section enforces bars operating a stopped vehicle's engine for a foreseeable period exceeding five minutes and is separately enforceable by the Massachusetts Department of Environmental Protection, local and state police, fire departments, boards of health, and building inspectors, not just Cambridge PD.
100 itself; violators are cited and penalized under the state statute's own fine structure. The provision applies specifically to buses, trucks, taxis and automobiles operating on Cambridge streets, and it remains in the General Code as adopted, unchanged since Ord. 1139 in 1992.
Violations & Fines
There's no separate Cambridge fine tied to Section 10.17.100; it directs Police enforcement of the state idling ban rather than creating its own penalty. Violations of the underlying state law, G.L. c.90, Section 16A, carry a $100 fine for a first offense and $500 for each subsequent offense, enforceable by Cambridge Police, MassDEP, fire, health, or building officials.
Frequently Asked Questions
Does Cambridge set its own idling time limit?
What's the fine for illegal idling in Cambridge?
Which vehicles does the idling rule cover in Cambridge?
Who enforces the idling law on Cambridge streets?
Sources & Official References
Other rules in Cambridge
Compare Cambridge to another location·View the Massachusetts environmental rules overview
See something wrong?
Help us keep this page accurate. If you notice an error or outdated information, let us know.