California Department of Transportation

Environmental Regulation of Trucks

Environmental Regulation of Trucks

The California Air Resources Board (ARB) is responsible for developing statewide programs and strategies to reduce the emission of smog-forming pollutants and toxics by diesel-fueled mobile sources.  Several of their programs and strategies are related to heavy-duty trucks.  The ARB also offers financial assistance for retrofitting, repowering, or replacing trucks to reduce emissions. 

Additional information can be found at the following ARB web pages:

  • The Truck Stop web page has information on clean air requirements for diesel vehicles, trailers, transport refrigeration units (TRUs), and on funding.  ARB’s diesel hotline is (866) 634-3735 or (866) 6-DIESEL.
  • On-Road Diesel Activities web page includes information on the Heavy-Duty In-Use Vehicle Regulation and the Port Trucks / Drayage Trucks Regulation, and related links on financial assistance programs.
  • Drayage trucks web page outlines the compliance options for owners of drayage trucks to upgrade or replace truck engines in accordance with current regulations. 
  • ARB’s required registration for drayage trucks is also available online at this link. All trucks must be registered prior to port or rail yard entry.  A fact sheet on ARB’s Drayage Truck Registry is available here.
  • Requirements for Diesel Truck and Equipment Owners Fact Sheet (includes information about grants to help fleets and individuals comply with California regulations).  
  • Heavy-Duty Vehicle Air Quality Loan Program Fact Sheet provides information about a State loan program to provide financial assistance to truckers affected by the Statewide In-Use Bus and Truck Rule and the Heavy-Duty Vehicle Greenhouse Gas Emission Reduction Measure.
  • Funding Fact Sheet for Retrofits and Upgrades also provides information about incentive funding (over $1 billion) available for on-road heavy-duty diesel vehicle replacements and retrofits.

Also see the Office of System and Freight Planning’s Environmental Considerations web page for additional information.

Fact Sheet