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California trucking rules

Fees, CDL costs, weight and size limits, chain laws and new bills for truckers and trucking companies in California. Updated 2026-10-24.

Must-know rules · Weight, oversize & chains · Fees · Bills

Must-know rules

California caps most heavy trucks at 55 mph, no matter what cars are posted at, and keeps them in the right lanes. It also has Caltrans chain-control levels that apply to trucks, a strict 5-minute diesel idling limit, and CHP-run weigh stations with their own inspection rules. I could not confirm hazmat routing and tunnel rules, handheld phone and texting rules, IRP/IFTA/motor carrier permit and fuel-tax details, or SB 415 and SB 153 from official sources this session, so those are left out.

Researched by our AI agent from the linked sources on 2026-10-21. Always confirm with the source.

• Must knowLegal weight and length (no permit)

  Maximum gross weight is 80,000 lb. Generally 20,000 lb on a single axle and 34,000 lb on a tandem, with proper tire ratings. Combinations are limited to 65 ft, 75 ft, or unlimited depending on the route. Legal trucks also cannot exceed a 40-ft kingpin-to-rear-axle (KPRA) length.

  Legal Basis for Truck Restrictions - Caltrans
• Must knowCargo and route-specific truck restrictions (hazmat partial)

  About 20 state route segments carry specific truck restrictions, including axle count, gross weight, length, and cargo type such as flammables, explosives and radioactive materials. I could not confirm statewide hazmat routing or tunnel rules this session, so check Caltrans restrictions before hauling hazmat.

  Legal Basis for Truck Restrictions - Caltrans

Weight limits, oversize permits and chain laws

California's permit threshold is loads wider than 8'6", taller than 14', or heavier than 80,000 lb. A single-trip permit costs $16 and lasts 7 consecutive days. Chains are required only when Caltrans posts a chain control, with no seasonal carry mandate. I found no official source stating a truck chain fine amount, and none for frost laws or seasonal weight restrictions.

Weight limits

80,000 lb gross, 20,000 lb single axle, 34,000 lb tandem
I found no official source for a statutory limit above 80,000 lb on any particular road class. Extralegal weight is reviewed against Caltrans's color-coded bridge route system, and load-posted bridges are not available for extralegal weight moves. The 34,000 lb tandem figure comes from CVC 35551, which sets group limits by axle spacing. I confirmed it only through a statute-text copy, not the Calt
An overweight permit is required when any single axle (including the steering axle) exceeds 20,000 lb, or when an axle group exceeds the legal weight in CVC 35551(a). Single-trip permits cover loads over 80,000 lb. Permits are issued only for good cause and for loads or vehicles that are reasonably non-divisible. A permit cannot be used to move a vehicle that has been placed out of service for a s Source

Legal size without a permit

8 ft 6 in wide, 14 ft high, 53 ft semitrailer
Single-trip oversize permit: $16 from Caltrans Office of Commercial Vehicle Operations, Permits Issuance Branch, 1120 N St., Sacramento, CA 95814; (916) 322-1297; 8am-5pm Mon-Fri, closed on state ho
WIDTH/HEIGHT: Statute caps total outside width of a vehicle or load at 102 inches (8.5 ft). Height may not exceed 14 feet. Anything over 13'6" may only be operated on highways deemed safe by the owner or operator. SEMITRAILER LENGTH: 53 ft is the maximum, and it is legal only on STAA routes (National Network and Terminal Access). It needs a kingpin-to-rear-axle (KPRA) distance of 40 ft or less for Source

Chain law

Chains required when signs say so
Chains are required only when Caltrans or CHP post a chain control (R-1, R-2 or R-3). I found no calendar-season carry requirement for trucks, and no fine amount stated by Caltrans. A driver can be cited and fined by CHP for not complying. At Donner Summit, when a truck-screening (TS) status is posted, drivers must have maximum chains in their possession to proceed, and trucks without chains are t Source

• Must knowR-1 chain rules for trucks and trailers

  R-1 requires chains on all vehicles except passenger vehicles and light-duty trucks under 6,000 lb gross with snow tires on two drive wheels. Vehicles towing trailers must have chains on one drive axle, and trailers with brakes need chains on at least one axle. R-3 requires chains on all vehicles with no exceptions, and highways are often closed before R-3 is imposed.

  Chain Controls / Chain Installation - Caltrans

Fees and DOT requirements

California charges weight-based commercial registration (CVRA) of $586 for a 26,001-lb truck and $2,064 for an 80,000-lb combination, before registration, VLF and county charges. Even intrastate-only for-hire carriers need a CHP-issued CA number and a DMV Motor Carrier Permit, and CARB's Clean Truck Check emissions testing applies to most diesel trucks over 14,000 lb. The CDL fee on the official DMV page I retrieved looks out of date, so verify it before budgeting.

Class B CDL

See source for 5 years
The official DMV fee page, as retrieved, lists Class A/B commercial at $82 original, $48 renewal, $37 retest and $36 duplicate. It does not show a revision date, and its noncommercial figure ($37) is lower than the 2026 Class C fee of $46 that secondary sites report. Several 2026 secondary sites (e. Source

Class A CDL

See source for 5 years
California uses one fee line for 'Commercial Class A or B', so Class A has the same fee as Class B. The official page as retrieved shows $82 original, $48 renewal and $37 retest, which looks stale. Secondary 2026 sources report $100 original and $59 renewal, so fee_usd is null pending confirmation. Source

Registration, 26,001 lb straight truck

$586 a year Source

Registration, 80,000 lb combination

$2,064 a year Source

How registration is figured

Commercial vehicles operating at a declared gross weight (GVW) or combined gross weight (CGW) of 10,001 lb or more pay Commercial Vehicle Registration Act (CVRA) weight fees by declared weight bracket. This is in addition to the standard registration fee, the Vehicle License Fee (VLF, a percentage o
The $586 figure is the 26,001–30,000 lb bracket and the $2,064 figure is the 75,001–80,000 lb bracket, both from the DMV Appendix 1F schedule. These are the weight fees only. DMV's Appendix 1F lists a CVRA motor vehicle fee of $122 that cannot be prorated. It is unclear from the retrieved text whether that $122 is included in the bracket amounts or added on top, so check the DMV fee calculator. Ot Source

Intrastate operating authority

Motor Carrier Permit (MCP), issued by DMV, with a CA number (carrier ID) issued by CHP. annual.
DMV says any person or business paid to transport property in a motor vehicle needs an MCP, regardless of vehicle size, type or weight. Fees depend on whether the carrier is for-hire or private and on the number of power units. For-hire fees consist of a Safety Fee, the Uniform Business License Tax (UBLT) and a Carrier Inspection Fee (CIF). The DMV pages I retrieved did not show the exact dollar a Source

State DOT requirements

• Must knowCA number (state carrier ID)

  The CHP issues the CA number exclusively, and it is used as the MCP number. Apply with a Motor Carrier Profile (CHP 362) at the nearest CHP Motor Carrier Safety Unit.

  Motor Carrier Permit FAQs - California DMV

See all 6 DOT requirements with full access

Fees change; confirm with the linked state source. Compare all states.

New California trucking bills

Enacted signed into law · Pending still moving through the legislature · Did not pass

• Enacted CA SB415: Planning and zoning: logistics use developments: truck routes. Chaptered by Secretary of State. Chapter 316, Statutes of 2025. · 2025-10-03

Bill data from LegiScan (CC BY 4.0).