Utah Truck Idling Law
Utah has no statewide idling time limit for trucks. State law covers school buses and prohibits leaving a truck idling unattended (Utah Code 41-6a-1403 requires stopping the engine and removing the key), but the real limits are local: Salt Lake City caps idling at 2 minutes ($50 to $210), Park City and Sandy at 1 minute, and Logan at 2 minutes.
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
This state has no statewide idling limit, so there are no statutory exemptions to list. Local ordinances, where they exist, carry their own.
APUs and idle-reduction gear
No statewide rule.
City and county ordinances
- Salt Lake City: 2 minutes, $50 to $210 (SLC Code 12.58)
- Park City: 1 minute
- Sandy: 1 minute (Traffic Code 14-7-8)
- Logan: 2 minutes, $40 fine, exempt below 0F (Code 10.52.270)
- Summit County (unincorporated, I-80 corridor): 1 minute (Code 6-4-1)
- South Salt Lake and Salt Lake County have their own ordinances
Utah Idling Law FAQ
Is there a truck idling law in Utah?
How long can a truck idle in Utah?
What is the fine for idling in Utah?
Does an APU count as idling in Utah?
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 Traffic laws change and this can be out of date, so always confirm the current statute and obey posted signs before you rely on it.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=UT. See our Terms & Disclaimer.
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