CA state page · Last reviewed 2026-05-25
California Truck Weight Limits and Permit Sources California truck weight limits, Caltrans permit sources, seasonal notes, and overweight fine references with field-level official links.
This page is a reference aid, not legal advice. Weight rules, permits, routes,
and penalties can change without notice; use the linked official source as the
final authority.
At-a-glance summary Field Value Source Status Confidence Gross 80,000 lb maximum vehicle combination gross weight in the Caltrans weight limitation summary. confirmed high Single axle 20,000 lb maximum on a single axle; steering axle must also follow tire/manufacturer load limits. confirmed high Tandem axle 34,000 lb for an axle group with less than 8 ft 6 in between outer axles. confirmed high Bridge formula California uses axle-group spacing tables and the federal Interstate framework; verify the exact group spacing before relying on 80,000 lb. inferred from official source medium Permit agency California Department of Transportation, Transportation Permits / Office of Commercial Vehicle Operations. confirmed high Seasonal / frost No official statewide frost-season weight restriction found during this review. no statewide rule confirmed low Fine source California Vehicle Code section 42030 is the official fine schedule reference for weight violations. confirmed high
Field-level reference data Regular weight limits Gross vehicle weight limit 80,000 lb maximum vehicle combination gross weight in the Caltrans weight limitation summary. confirmed high Single axle limit 20,000 lb maximum on a single axle; steering axle must also follow tire/manufacturer load limits. confirmed high Tandem axle limit 34,000 lb for an axle group with less than 8 ft 6 in between outer axles. confirmed high Bridge formula applies California uses axle-group spacing tables and the federal Interstate framework; verify the exact group spacing before relying on 80,000 lb. inferred from official source medium Interstate notes Federal Interstate checks still include single axle, tandem axle, gross weight, and bridge formula limits. confirmed high Non-Interstate notes California Vehicle Code weight sections and Caltrans summaries control state-road checks; local postings can be lower. inferred from official source medium
Axle and loading notes Steer axle notes Do not treat 12,000 lb as a universal legal steer limit; Caltrans points to axle, wheel, tire, and manufacturer limits. inferred from official source medium Drive axle notes Drive tandem weight should be checked against the 34,000 lb tandem rule and any bridge/axle-group table result. confirmed high Trailer tandem notes Trailer tandem position affects axle-group spacing and California bridge/axle-group compliance. inferred from official source medium Fifth wheel notes A fifth-wheel move changes steer and drive distribution, but it does not change the legal source that must be checked. inferred from official source medium Bridge law notes Caltrans publishes a CVC axle group weight chart for two or more consecutive axles. confirmed high
Oversize / overweight permits Permit agency California Department of Transportation, Transportation Permits / Office of Commercial Vehicle Operations. confirmed high Permit office name Caltrans Transportation Permits. confirmed high Official permit URL Caltrans Transportation Permits page. confirmed high Online permit portal Use the Caltrans permit page to reach the current application method; a separate portal URL was not confirmed in this review. not found in official review medium Permit contact Use the Caltrans Transportation Permits contact information on the official permit page. inferred from official source medium Permit notes Permit authority and route conditions should be confirmed before movement; California dimensions and weights are not validated by a scale ticket. inferred from official source medium
Seasonal and special restrictions Frost / seasonal restriction No official statewide frost-season weight restriction found during this review. no statewide rule confirmed low Seasonal weight notes California may have route, weather, chain, emergency, or local posting restrictions; no statewide frost-law source was confirmed. no statewide rule confirmed low Official seasonal URL not found in official review low
Fines and enforcement Overweight fine structure California Vehicle Code section 42030 is the official fine schedule reference for weight violations. confirmed high Overweight ticket notes Fine exposure depends on which weight limit was exceeded and the applicable Vehicle Code section. inferred from official source medium Enforcement agency California enforcement may involve CHP and local courts; this review confirmed Caltrans permit/weight sources, not a single enforcement agency page. inferred from official source low Fine official URL California Vehicle Code section 42030. confirmed high CSA / safety notes CSA impact should be checked through FMCSA materials and the actual inspection/citation record. inferred from official source medium
Scale notes Public scale notes Public scale tickets help the carrier check distribution; they are not California legal permits. inferred from official source medium Weigh station / enforcement notes California enforcement decisions should be checked against the actual officer/citation record and official code sections. inferred from official source medium CAT Scale disclaimer CAT Scale tickets are private scale records, not state-issued operating authority. inferred from official source medium Scale ticket notes Keep scale tickets with shipment records when close to axle or gross limits; verify final legality against Caltrans and CVC sources. inferred from official source medium
California’s public Caltrans weight page is unusually useful because it gives the
basic gross, axle, and axle-group figures in one place and points users back to
the Vehicle Code for legal wording. Use it as the starting page, then open the
permit and code links before making an operating decision.
One watchout specific to California: Caltrans publishes an axle-group weight
chart for two or more consecutive axles based on spacing, not a flat tandem
figure. A California legal-weight check for the drive tandem or any multi-axle
group should use the Caltrans chart for the actual spacing of the group, not only
the federal tandem number. Similarly, the steer axle limit is not simply 12,000
lb — Caltrans points to tire load ratings and manufacturer limits, which can
control before the statutory axle limit is reached.
How to verify this yourself
Open the Caltrans weight limitation page first. For a move above normal legal
weight or size, use the Caltrans Transportation Permits page. For fine exposure,
open California Vehicle Code section 42030 and compare the cited weight category
with the actual citation.
FAQ Does 80,000 lb automatically satisfy California weight rules? No. Caltrans lists an 80,000 lb vehicle-combination gross limit, but axle, tire, bridge, route, registration, and permit rules can be more restrictive.
Where should I verify a California overweight permit? Start with the Caltrans Transportation Permits page and use any current application or contact link published there.
Does California have a statewide frost law? No official statewide frost-season weight restriction was confirmed in this review.