California CMV Compliance Guide
CA DOT regulations for commercial motor vehicles
CA DMV Motor Carrier ServicesOfficial CA DOT websiteOverview
California has one of the most extensive and strict commercial vehicle regulatory environments in the nation. Enforcement is shared between the California Highway Patrol (CHP), the California Air Resources Board (CARB), and the DMV Motor Carrier Services division. California imposes requirements beyond federal standards, particularly around emissions, meal/rest breaks for drivers, and the Biennial Inspection of Terminals (BIT) program.
Inspection & Enforcement Program
California's BIT (Biennial Inspection of Terminals) program is unique. Every motor carrier with a terminal in California must have a CHP-assigned BIT inspector conduct a terminal inspection every 25 months. This is in addition to federal annual vehicle inspections. CHP also performs roadside inspections at fixed Commercial Vehicle Enforcement Facilities (CVEFs) and through mobile units. California has approximately 40 CVEF locations.
Weight Limits & Oversize/Overweight
California follows federal weight limits on Interstate highways (80,000 lbs GVW). On state highways, California enforces a kingpin-to-rear-axle (KPRA) limit of 40 feet for trailers. The state has unique bridge formula calculations that may differ from the federal bridge formula on certain routes. California has numerous weight-restricted bridges and uses the Caltrans legal truck access guide for route restrictions.
California-Specific Requirements
- California's BIT (Biennial Inspection of Terminals) program requires a CHP terminal inspection every 25 months for carriers with a California terminal. This is in addition to the federal annual vehicle inspection.
- CARB requires all trucks and buses operating in California to meet specific emissions standards. The Advanced Clean Fleets regulation requires zero-emission vehicle purchases starting in 2024 for certain fleets.
- California enforces meal and rest break requirements for drivers that go beyond federal Hours of Service rules (30-minute meal break within the first 5 hours of work, 10-minute rest break every 4 hours).
- The state requires a Motor Carrier Permit (MCA) for all carriers operating commercial vehicles in California, obtained through the DMV.
- California's 53-foot trailer length limit applies to designated California Legal routes. Longer trailers require STAA route designation.
Contact
CHP Commercial Vehicle Section: (916) 843-3400 | CARB: (800) 242-4450
Federal Requirements That Apply in California
In addition to California-specific regulations, all federal DOT and FMCSA requirements apply to commercial vehicles operating in CA. These guides cover each federal requirement in detail:
This information is provided as a general reference. State regulations change frequently. Always verify current requirements with the California DOT or your compliance advisor before relying on any information presented here.