Truck idling laws by state: who limits it, for how long, and what a first ticket costs

Nobody official keeps the count, so here is ours: the American Transportation Research Institute’s June 2025 compendium lists a state-level idling rule for 21 states plus Washington, D.C., local ordinances only for 10 more, and nothing for the remaining 19. The Department of Energy’s Alternative Fuels Data Center, the other standard reference, publishes no total at all, and the number moves with who is counting and what they count.

How many states have idling laws

AFDC’s state picker mixes laws with incentives and points to IdleBase, an Argonne National Laboratory spreadsheet with one tab per state and “last confirmed” dates from 2020. ATRI’s compendium carries a disclaimer and no total. So we counted ATRI’s June 2025 listing: a state-level entry for 21 states plus D.C.; local ordinances only in 10 (Arizona, Colorado, Georgia, Idaho, Kansas, Michigan, Minnesota, Ohio, Utah, Wisconsin); and no entry for 19, Florida and Washington among them.

Three things make every count slippery:

• Part of a state is not the state. Illinois’s 10-minute rule (625 ILCS 5/11-1429) covers nine Chicago-area and Metro-East counties plus three townships. Texas’s 5-minute rule is enforced only where a local government signed an agreement with TCEQ, currently nine jurisdictions including Houston, Austin, and El Paso. Arizona’s statute (ARS 11-876) sets no limit at all; it orders Phoenix-area counties to write one, and Maricopa County’s Ordinance P-21 picked 5 consecutive minutes.
• Which vehicles. New Jersey, Massachusetts, Maryland, and Vermont limit every motor vehicle. California, Pennsylvania, New York, and Delaware reach only trucks and buses above a weight line (10,000, 10,001, 8,500, and 8,500 lbs GVWR).
• Laws versus everything else. AFDC’s pages for Washington, Georgia, and Florida each list one “idle reduction” item, a weight allowance for trucks carrying idle-reduction equipment (400, 550, and 550 lbs), not a limit. Colorado’s 5-minutes-per-hour state standard is enforced locally, so ATRI lists only its cities; a 2024 law let local governments match or exceed it.

The 3-minute states and the 5-minute states

Each row was checked against the statute or agency page linked in the last column; the full state files, with exemptions and how to report, are in the idling laws directory.

State	Limit	Applies to	First offense	Rule
New Jersey	3 consecutive minutes	All vehicles, diesel and gasoline	$250 minimum ($250 to $1,000 per day, per vehicle)	N.J.A.C. 7:27-14.3 and 7:27-15
Connecticut	3 consecutive minutes	Motor vehicles	No fixed schedule; DEEP enforcement action	RCSA 22a-174-18(b)(3)
Delaware	3 minutes	Over 8,500 lbs GVWR	$50 to $500; repeats $500 to $1,500	7 DE Admin. Code 1145
Washington, D.C.	3 minutes; 5 below 32°F	Commercial gasoline and diesel vehicles; private cars exempt	$500	20 DCMR 900
Virginia	3 minutes in urban areas; 10 for diesels and tour buses	Commercial and public-service vehicles	No amount in the rule	9VAC5-40-5670
California	5 consecutive minutes	Diesel over 10,000 lbs GVWR	$300 minimum; up to $1,000 per day	13 CCR 2485
New York State	5 minutes	Over 8,500 lbs GVWR	$500 to $18,000	6 NYCRR 217-3
Massachusetts	5 minutes	All vehicles	Up to $100; up to $500 after	MGL c.90 §16A
Maryland	5 consecutive minutes	All vehicles except historic	Up to $500 (general Vehicle Law penalty, no idling-specific amount)	Transp. §22-402
Pennsylvania	5 minutes in any 60	Diesel 10,001 lbs and up, in commerce	$150 to $300 plus court costs	Act 124 of 2008
Vermont	5 minutes in any 60	All vehicles	Up to $10; then $50, then $100	23 V.S.A. §1110
Rhode Island	5 consecutive minutes in any 60	Diesel vehicles	Up to $100; up to $500 after	250-RICR-120-05-45
Arizona (Maricopa County)	5 consecutive minutes	Diesel over 14,000 lbs GVWR	$100; $300 after	ARS 11-876; Ordinance P-21
Texas (opt-in cities)	5 consecutive minutes	Vehicles in opt-in jurisdictions	Set locally	30 TAC 114.512
Illinois (Chicago area)	10 minutes in any 60	Diesel 8,000 lbs and up	$90; $500 within 12 months	625 ILCS 5/11-1429

The exemptions truckers rely on

Traffic. California, New Jersey, Connecticut, Pennsylvania, New York, Maryland, Illinois, Rhode Island, and Maricopa County all carve out a vehicle held motionless by traffic, a signal, or an officer. Dock queues are narrower: New Jersey covers a queue that is “intermittently motionless and moving”; California allows queuing only beyond 100 feet of homes and schools; Pennsylvania allows 15 minutes per hour for loading or unloading; Illinois allows 30 minutes per hour waiting to weigh, load, or unload, but only between 32°F and 80°F.

Sleeper-berth rest. Illinois exempts a vehicle while the operator occupies it during a rest or sleep period, Rhode Island exempts heating or cooling during a federally mandated rest, and Maricopa County exempts idling to comply with 49 CFR Part 395 hours of service. New Jersey allows main-engine idling for a resting driver only with a model-year 2007 or newer engine or a working particulate-filter retrofit. Pennsylvania’s sleeper-berth exemption expired May 1, 2010. California offers none for the main engine: the compliant options are a CARB Clean Idle engine (2008 or later, certified to the optional NOx idling standard), which may idle without limit except within 100 feet of housing, schools, hotels, hospitals, and care facilities, or a battery APU. A diesel-fueled APU is itself capped at 5 minutes inside that 100-foot zone.

APUs and clean-idle engines. New Jersey, Rhode Island, and Illinois allow APUs for heat, cooling, and power. Texas mirrors California: vehicles over 14,000 lbs with a 2008 or newer engine certified at no more than 30 grams of NOx per hour at idle are exempt.

Temperature. New Jersey: a vehicle stopped 3 or more hours may idle 15 minutes below 25°F. Connecticut: below 20°F. D.C.: 5 minutes instead of 3 below 32°F. New York: diesel trucks below 25°F. Illinois: below 32°F or above 80°F. Rhode Island: heating up to 15 minutes per hour between 0°F and 32°F.

Power take-off and work. Every rule we read in full exempts an engine powering equipment: refrigeration, lifts, pumps, mixers. Cabin heat and air conditioning are explicitly not “work” in New Jersey, Pennsylvania, D.C., and Virginia.

Inspections and repair. California, New Jersey, Pennsylvania, New York, Illinois, and Rhode Island exempt idling during a state or federal inspection; Massachusetts, Connecticut, Pennsylvania, and Maricopa County exempt engine operation needed for repair or diagnostics.

No statewide law does not mean no rule

Washington, Ohio, Georgia, and Florida have no statewide limit; AFDC shows a weight allowance (Washington, Georgia, Florida) or a bus-replacement grant program (Ohio) and nothing else. Their cities are another matter. DOE’s IdleBase and ATRI both record Cleveland’s Codified Ordinances 431.44 at 5 minutes in any 60-minute period, 10 at a loading dock or below 32°F or above 85°F, with a $150 fine per ATRI’s June 2025 reading, and Atlanta’s Code 150-97 at 15 minutes for trucks and buses, 25 below 32°F, with a $500 minimum fine. We could not fetch either city’s code text; the ordinance is the authority, and those figures are the compendia’s reading of it. The reverse also happens: Colorado, Texas, and Arizona have state rules that only bite where a city or county adopts them.

Where enforcement is real

New York City. Admin Code 24-163 sets 3 minutes, and 1 minute next to a school or park. Under section 24-182, added by Local Law 58 of 2018, a resident whose time-stamped video of an idling truck or bus leads to a penalty is awarded 25% of the proceeds; the Mayor’s office puts penalties at $350 to $1,000 for a first violation, $440 to $1,500 for a second, and $600 to $2,000 after that. That is thousands of paid filers, not a few inspectors. Filing is covered in the NYC idling bounty guide; volumes, outcomes, and the most-fined companies are on the data desk, refreshed monthly.

California. CARB, air districts, and any peace officer can cite. CARB’s enforcement notice set a $300 minimum for a first violation and $1,000 to $10,000 after; its current fact sheet says a truck of 10,000 lbs or more can be fined up to $1,000 per day, and staff enforce by “monitoring sleeper berths” where trucks operate.

New Jersey and Pennsylvania. New Jersey police cite on roadways; DEP and county health agencies cite parked vehicles off the highway. Pennsylvania’s Act 124 also binds the owner of the place where a truck idles, requires a no-idling sign at any lot with 15 or more spaces, and allows civil penalties up to $1,000 per day.

What a first ticket costs

Read the table’s fourth column with two things in mind. Several statutes run per day and per vehicle (New Jersey’s $250 to $1,000, California’s up to $1,000, Pennsylvania’s civil penalty up to $1,000), so a depot that idles routinely is not paying one fine. New York State’s $500 to $18,000 is an agency range, not a fixed ticket. Connecticut and Virginia write no dollar amount into their idling rule, falling back to each state’s general air-pollution enforcement penalty ($5,000 and $25,000 respectively); Maryland’s idling rule likewise sets none, so a violation falls under the state’s general Vehicle Law penalty, capped at $500. Texas and Colorado leave the amount to the enforcing city. For what NYC summonses actually settle for and when contesting beats paying, see idling fine costs and contest or pay.

A compliance checklist for fleets

• Set the key-off policy at 3 minutes; it satisfies every statewide rule in the table and New York City, except the 1-minute school and park zones.
• Put ATRI’s free June 2025 cab card in every truck.
• Spec sleeper trucks for California (Clean Idle certification or an APU) and New Jersey (a 2007-or-newer engine or particulate-filter retrofit for rest idling).
• Post the sign at Pennsylvania lots with 15 or more spaces; the location owner shares liability.
• Route every summons to one owner with a deadline calendar; the fleet compliance page shows what unmanaged NYC summonses cost at scale.

Where to check the states not covered here

This site’s directory holds 21 verified state files, each with statute and agency links. For the rest, start with AFDC’s state picker and IdleBase (mind the 2020 dates), then ATRI’s June 2025 compendium, and finish with the statute or city code itself. Where a source sets no number, we do not invent one.