Utah Car Idling Laws: Prohibited Anywhere Standing

Q: Which Utah law actually covers this?

Utah Code 41-6a-1403, “Motor vehicle left unattended -- Requirements.”, in the Utah vehicle code. It is a theft provision rather than an environmental one, which is why a search for an idling law does not return it. The operative sentence is quoted on this page and links to the Utah State Legislature page it was read from.

Q: Does it matter whether the car was locked in Utah?

Not to whether the section applies. Nothing in the Utah section makes the offence depend on whether the car was locked or the key taken out, which separates it from the 9 states where that is exactly what it depends on. What Utah Code 41-6a-1403 requires is set out in its own words above.

Q: Can you leave a car running in your own driveway in Utah?

The Utah section carries no scope sentence narrowing it to a road, so nothing in the statute distinguishes a driveway from a street. 20 states do carry one, and those are listed on the national page along with the sentence each of them uses.

Q: What does Utah charge for it?

Utah prints no penalty inside the section, which is the commoner pattern: a violation falls to the chapter's general penalty provision. 18 states of the 34 print one where a reader would find it. The states that do print one are collected on the national page with the wording each of them uses.

Q: How current is this?

Every line was read on September 23, 2026, off the state's own published code, and links back to the section it came from. Legislatures amend these between sessions and a repeal leaves the old text in circulation for years afterwards, so the link beside each quote is what governs on the day.

Prohibited

Leaving it running unattended

Utah Code 41-6a-1403

No

Whether the lock matters

9 states of the 34 are built on it

No scope limit

How far the chapter reaches

20 states confine theirs to a road

None

Separate idling limit

only 16 states run one

September 23, 2026

Read

off the state’s own code

The short answer

Utah prohibits it wherever the car is standing.

Utah prohibits leaving a motor vehicle standing unattended with the engine running, and its section names no place where that does not hold. Five states read this way, against 20 whose chapters apply to a road and not elsewhere and 9 where the offence needs the car to have been left unsecured. The section is quoted below with the sentence the reading rests on.

The Utah chapter carries no scope provision narrowing this section to a road, unlike the 20 states whose chapters do.

AlwaysUtah Code 41-6a-1403No separate idling limit

The section itself

Utah Code 41-6a-1403, and the sentence it turns on

This is a theft provision rather than an environmental one, which is why a search for a Utah idling law does not return it and why so much of what is written about it is written about a different statute. It sits in the vehicle code with the rules about stopping and standing, and it was put there to stop cars being driven away by somebody who did not own them.

The operative sentence is reproduced below rather than summarised, because everything that separates one state from the next in this reading sits inside it. The card carries the citation, the title the code gives the section, and the link the sentence was read from.

Utah Code 41-6a-1403

Always

Motor vehicle left unattended -- Requirements.

(1) A person operating or in charge of a motor vehicle may not permit the vehicle to stand unattended without: (a) stopping the engine; (b) locking the ignition and removing the key; (c) placing the transmission in "park" or the gears in "low" or "reverse" if the vehicle has a manual shift; or (d) effectively setting the brakes thereon. (2) A person shall turn the front wheels to the curb or side of the highway when standing a vehicle on any perceptible grade.

The sentence that decides where it reaches

The provisions of this chapter relating to the operation of vehicles refer exclusively to the operation of vehicles upon highways, except: (1) when a different place is specifically identified; (2) under the provisions of Section 41-6a-210, Part 4, Accident Responsibilities, and Part 5, Driving Under the Influence and Reckless Driving, which apply upon highways and elsewhere throughout the state; or (3) on private roads within the confines of a campus of a private institution of higher education that has a certified private law enforcement agency, as authorized by Subsection 53-19-202(1)(b).

What it turns on Prohibited wherever the car is standing

Utah Code Section 41-6a-1403, Motor vehicle left unattended, Utah State Legislature, read September 23, 2026

Where the duty stops

The Utah chapter carries no limit to a road

The Utah chapter carries no scope provision narrowing this section to a road, unlike the 20 states whose chapters do.

A scope provision is where 20 of the fifty put the limit that a driveway question turns on, so its absence here is worth saying out loud rather than leaving a reader to assume one is there. Nothing in the chapter distinguishes a driveway from a street.

A two storey house behind a long concrete driveway with two cars parked up by the garage doors, a public footway crossing the foreground, and a thin dusting of snow over everything — Twenty of these sections sit in a chapter that reaches only a highway or a public way. The line those chapters turn on runs across the bottom of this frame, and it is nowhere in the section a reader would have found. “A dusting of snow on the front of a house and driveway along Aqueteong Lane, Ewing Township, Mercer County, New Jersey”, Famartin, CC BY-SA 4.0

The other law entirely

Utah runs no emissions idling limit

Utah runs no separate emissions idling limit, so there is nothing behind the results a search for an idling law returns. Only 16 states run one at all, and most are written for buses and for trucks above a weight rather than for a car.

The two are kept apart on this page for the same reason they are apart in the books. An unattended vehicle section sits in the vehicle code and exists to stop a car being taken. An idling limit is an air quality regulation, written by an environmental agency, aimed mostly at buses and at trucks above a weight, and enforced by somebody else. Only 16 states publish one at all, and 2 of those name the regulation without putting a figure where a reader can reach it.

How Utah compares

The same question in the other forty nine

34 states prohibit leaving a car running unattended and 16 have no section for it. Of the 34, 9 turn on whether the car was left unsecured, 20 sit in a chapter that reaches a road and nothing else, and 5 apply wherever the car is standing.

The bar splits the fifty by what their section does, and the table beneath it puts the strictest reading first, which is not the order a reader would guess from a map of how cold it gets.

5Always

9If unlocked

17Highways

3Public ways

16No section

Fifty state vehicle codes read September 23, 2026, strictest reading first.
State	What the section does	Citation	Turns on the lock	Separate idling limit
Kentucky	AlwaysProhibited wherever the car is standing	KRS 189.430	No	No
Louisiana	AlwaysProhibited wherever the car is standing	La. R.S. 32:145	No	No
Nevada	AlwaysProhibited wherever the car is standing	NRS 484B.530	No	No
Utah	AlwaysProhibited wherever the car is standing	Utah Code 41-6a-1403	No	No
Vermont	AlwaysProhibited wherever the car is standing	23 V.S.A. § 1111	No	Yes
Colorado	If unlockedOnly where the car was left unlocked or the key left in it	C.R.S. 42-4-1206	Yes	No
Florida	If unlockedOnly where the car was left unlocked or the key left in it	Fla. Stat. § 316.1975	Yes	No
Idaho	If unlockedOnly where the car was left unlocked or the key left in it	Idaho Code 49-602	Yes	No
Illinois	If unlockedOnly where the car was left unlocked or the key left in it	625 ILCS 5/11-1401	Yes	Yes
Kansas	If unlockedOnly where the car was left unlocked or the key left in it	K.S.A. 8-1573	Yes	No
Maryland	If unlockedOnly where the car was left unlocked or the key left in it	Md. Code Ann., Transp. 21-1101	Yes	Yes
New Hampshire	If unlockedOnly where the car was left unlocked or the key left in it	RSA 265:72	Yes	Yes
Ohio	If unlockedOnly where the car was left unlocked or the key left in it	Ohio Rev. Code 4511.661	Yes	No
Texas	If unlockedOnly where the car was left unlocked or the key left in it	Tex. Transp. Code Sec. 545.404	Yes	Yes
Alabama	HighwaysProhibited, but the chapter reaches highways only	Ala. Code Section 32-5A-50	No	No
Alaska	HighwaysProhibited, but the chapter reaches highways only	13 AAC 02.480	No	No
California	HighwaysProhibited, but the chapter reaches highways only	Cal. Veh. Code 22515	No	Yes
Delaware	HighwaysProhibited, but the chapter reaches highways only	21 Del. C. § 4182	No	Yes
Hawaii	HighwaysProhibited, but the chapter reaches highways only	HRS 291C-121	No	No
Michigan	HighwaysProhibited, but the chapter reaches highways only	Mich. Comp. Laws 257.676	No	No
Mississippi	HighwaysProhibited, but the chapter reaches highways only	Miss. Code Ann. 63-3-909	No	No
Nebraska	HighwaysProhibited, but the chapter reaches highways only	Neb. Rev. Stat. 60-6,168	No	No
New Jersey	HighwaysProhibited, but the chapter reaches highways only	N.J.S.A. 39:4-137	No	Yes
New Mexico	HighwaysProhibited, but the chapter reaches highways only	NMSA 1978, Section 66-7-353	No	No
New York	HighwaysProhibited, but the chapter reaches highways only	N.Y. Vehicle and Traffic Law § 1210	No	Yes
Oklahoma	HighwaysProhibited, but the chapter reaches highways only	47 O.S. 11-1101	No	No
Oregon	HighwaysProhibited, but the chapter reaches highways only	ORS 811.585	No	Yes
Pennsylvania	HighwaysProhibited, but the chapter reaches highways only	75 Pa.C.S. § 3701	No	Yes
South Carolina	HighwaysProhibited, but the chapter reaches highways only	S.C. Code Ann. SECTION 56-5-2570	No	No
Tennessee	HighwaysProhibited, but the chapter reaches highways only	Tenn. Code Ann. 55-8-162	No	No
Washington	HighwaysProhibited, but the chapter reaches highways only	RCW 46.61.600	No	No
Massachusetts	Public waysProhibited, but the statute reaches a public way only	M.G.L. c. 90, § 13	No	Yes
North Carolina	Public waysProhibited, but the statute reaches a public way only	N.C.G.S. § 20-163	No	No
Rhode Island	Public waysProhibited, but the statute reaches a public way only	R.I. Gen. Laws § 31-22-1	No	Yes
Arizona	No sectionNo unattended vehicle section in the code	No section	No	No
Arkansas	No sectionNo unattended vehicle section in the code	No section	No	No
Connecticut	No sectionNo unattended vehicle section in the code	No section	No	Yes
Georgia	No sectionNo unattended vehicle section in the code	No section	No	No
Indiana	No sectionNo unattended vehicle section in the code	No section	No	No
Iowa	No sectionNo unattended vehicle section in the code	Iowa Code 321.362	No	No
Maine	No sectionNo unattended vehicle section in the code	No section	No	Yes
Minnesota	No sectionNo unattended vehicle section in the code	No section	No	No
Missouri	No sectionNo unattended vehicle section in the code	No section	No	No
Montana	No sectionNo unattended vehicle section in the code	Mont. Code Ann. 61-8-357	No	No
North Dakota	No sectionNo unattended vehicle section in the code	No section	No	No
South Dakota	No sectionNo unattended vehicle section in the code	SDCL 32-30-5	No	No
Virginia	No sectionNo unattended vehicle section in the code	No section	No	Yes
West Virginia	No sectionNo unattended vehicle section in the code	No section	No	No
Wisconsin	No sectionNo unattended vehicle section in the code	No section	No	No
Wyoming	No sectionNo unattended vehicle section in the code	W.S. 31-5-509	No	No

Utah car idling questions

Is it illegal to leave your car running unattended in Utah?

Utah prohibits leaving a motor vehicle standing unattended with the engine running, and its section names no place where that does not hold. Five states read this way, against 20 whose chapters apply to a road and not elsewhere and 9 where the offence needs the car to have been left unsecured. The section is quoted below with the sentence the reading rests on. The Utah chapter carries no scope provision narrowing this section to a road, unlike the 20 states whose chapters do.

Which Utah law actually covers this?

Does it matter whether the car was locked in Utah?

Can you leave a car running in your own driveway in Utah?

What does Utah charge for it?

Does Utah have an idling limit?

How current is this?

Car idling laws in every state

Utah studded tire lawThe other winter driving rule a state writes and a city can change, with the dates each one sets.Utah sidewalk snow rulesHow long a city gives before the walk has to be clear, quoted from the ordinance that sets it.Utah frozen pipesWhat the same cold morning is doing to the building the car is parked beside.Utah first snowWhen the mornings that raise this question usually start, measured against the years behind it.

Utah read September 23, 2026, off the state’s own published code: Utah Code 41-6a-1403 and the chapter it sits in. Every quotation above is reproduced in the source’s own wording and links back to the document it was read from. Legislatures amend these between sessions and a repealed section stays in circulation for years afterwards, so the link beside a quote is what governs on the day. What Utah wrote is what this page carries: the offence, the clause it turns on, how far the chapter reaches, what the legislature exempted, and the sentence it set.