Utah commercial vehicle weight limits follow the federal Interstate standard of 80,000 lbs gross, 20,000 lbs per single axle, and 34,000 lbs per tandem axle group. The federal bridge formula (23 U.S.C. 127) applies on all routes. No seasonal weight restrictions on Interstate highways. Oversize and overweight permits are available from UT DOT for loads exceeding standard limits. Verify current road-specific postings with the Utah DOT before routing heavy loads.
The federal bridge formula limits the weight on any group of axles based on the distance between the outermost axles in the group. It applies in Utah on all routes where federal standards apply.
W = maximum weight in lbs · L = axle spacing in feet · N = number of axles
UDOT issues oversize/overweight permits through the Utah Trucking Portal. Single-trip permits required for loads exceeding standard limits. Annual permits available for qualifying recurring operations. Superloads require engineering review and route approval. Utah's mining sector generates significant superload permit activity for mining equipment transport.
Apply for Utah OS/OW Permit →The maximum gross vehicle weight in Utah on Interstate highways is 80,000 lbs — the federal standard. Single axle limit is 20,000 lbs and tandem axle is 34,000 lbs. Utah does not impose additional state weight restrictions on Interstates. State routes and secondary roads may have lower posted limits. Overweight permits from UDOT are required for loads exceeding standard limits.
No. Utah does not impose seasonal spring weight restrictions on Interstate highways. The state's arid climate means roads generally are not subject to significant freeze-thaw damage on major routes. Secondary roads and lower-elevation state routes may occasionally have temporary weight restrictions — check with UDOT before routing on secondary roads in early spring.
Yes. UDOT issues chain control requirements on I-80 through Parley's Canyon and Echo Canyon, and on I-15 in mountain segments during winter storms. Chain controls are operational requirements and do not reduce weight limits, but they affect commercial vehicle movement significantly from November through April. Monitor UDOT road conditions at udottraffic.utah.gov.
Utah oversize/overweight permits are issued by UDOT through the Utah Trucking Portal. Apply online at udot.utah.gov. Single-trip permits are available for most oversize or overweight loads. Annual permits are available for qualifying recurring operations. Utah's mining sector generates significant permit activity for oversized mining equipment moves — contact UDOT for superload engineering review requirements.
I-80 near the Salt Lake Valley and the US-48/Magna area routes serving Kennecott are subject to standard Utah and federal weight limits. Mining equipment that exceeds standard limits requires UDOT overweight/oversize permits. On-site haul roads within the mine property are not public highways and are not subject to public road weight limits. Contact UDOT for route-specific guidance on any non-Interstate route.
Find flatbed trucks, lowboys, and heavy-haul equipment from dealers in Utah.
Disclaimer
The information on this page is compiled from publicly available government sources and is provided for general informational purposes only. TruckRadar is an independent search engine — we are not affiliated with any government agency and this content does not constitute legal or compliance advice. Regulations change frequently; always verify current requirements directly with the official source before making compliance decisions.
Official source: Utah UT Department of TransportationLast reviewed: 2026-04