Utah Truck Lane Restrictions
Utah keeps heavy trucks out of the far-left lane. If your gross vehicle weight rating is 18,001 pounds or more, you can't run the leftmost lane on any freeway with three or more lanes each way (Utah Code 41-6a-702). You can use it only to line up a left exit, dodge merging traffic, or handle an emergency. HOV and short merge lanes don't count toward the three. The violation is an infraction.
Which lanes a truck can use in Utah
Utah keeps heavy trucks out of the far-left lane. If your gross vehicle weight rating is 18,001 pounds or more, you can't run the leftmost lane on any freeway with three or more lanes each way (Utah Code 41-6a-702). You can use it only to line up a left exit, dodge merging traffic, or handle an emergency. HOV and short merge lanes don't count toward the three. The violation is an infraction.
Roads, exceptions, and signs
- Where it applies: Freeways with 3+ general-purpose lanes each way — the Wasatch Front interstates (I-15, I-215, and I-80 through Salt Lake and Utah counties). Freeways only.
- Statutory. Applies by weight whether or not the segment is signed; UDOT also posts left-lane-restriction signs on qualifying freeways.
- General rule: Utah Code 41-6a-701 — general drive-on-the-right / slower-traffic-keep-right, applies to all vehicles statewide.
- CORRECTION to the ground-truth overview. Current Utah law uses an 18,001-lb GVWR trigger, NOT 'a trailer or over 12,000 lbs.' Verified verbatim against the official Utah Code: version effective 5/6/2026 (Amended by Chapter 344, 2026 General Session) and the prior version effective 5/12/2020 — subsection (2) reads 'gross vehicle weight rating of 18,001 or more pounds.' The old 12,001-lb / any-trailer language was superseded in 2020.
What a lane violation costs
Infraction. The Uniform Fine Schedule base amount is modest; the statutory ceiling for an infraction runs up to roughly $750 for an individual. Exact bail-schedule amount not separately confirmed.
Utah Truck Lane FAQ
Can a truck drive in the left lane in Utah?
Is there a truck lane restriction in Utah?
What is the fine for a lane violation 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 Traffic laws change and this can be out of date, so always confirm the current statute and obey posted signs before you rely on it.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://le.utah.gov/xcode/Title41/Chapter6a/41-6a-S702.html. See our Terms & Disclaimer.
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