the Truck Stop

All diesel fueled trucks, buses, trailers and transportation refrigeration units operating in California, including those based out of state, have requirements to reduce air pollution and improve the state's overall air quality.

Our hotline is experiencing a moderate volume of calls and it may affect response time. Staff has summarized common reporting and rule issues on the Diesel Hotline's Frequently Asked Questions and for more specific help, see our example fleets for owners of 1 to 3 trucks page. If you continue to have difficulty, call the Diesel Hotline at 866-6DIESEL (866-634-3735) or send an email to 8666DIESEL@arb.ca.gov. In addition to English, our operators can answer questions in Spanish and Punjabi.

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Click On Information About Clean Air Requirements:

Truck and Bus Regulation

Photo of a bus and two trucks, button for truck and bus menu page

Tractor- Trailer 53'+
(GHG)

Transport Refrigeration Units (TRU)

Is there any funding for my vehicle?

USEFUL LINKS

What Regs. Apply To Me?
Regulation Index
Training
Funding Resources Index
DPF/Soot Filter Information
Factsheets and Brochures
California Trucking News
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What's New?

Use Diesel Hotline's Frequently Asked Questions

For answers to questions, future deadlines, links to helpful hints for the Truck and Bus Regulation and Tractor-Trailer Greenhouse Gas Regulation, see the Diesel Hotline's Frequently Asked Questions.

Reporting Certificates

2013 Truck and Bus Regulation reporting certificates are now available on TRUCRS. If you reported earlier and your fleet’s reporting status is complete, you can log-in and print the certificate for 2013.

Cleaire Advanced Emission Controls Closes its Doors

Cleaire Advanced Emission Controls, Incorporated (Cleaire) ceased operations on Friday, January 18, 2013. ARB is working with other device manufacturers and stakeholders to ensure the impacts of this situation on affected fleets are minimized. Please see the Cleaire Customer Resources page for more information.

53’ box-type trailers, tire requirement delay

See the clarification of low rolling resistance tire requirements for 2010 and older tractors.

Installing a Diesel Particulate Filter?

Make sure you purchase a CARB verified filter to comply with clean air requirements!

Be aware that some companies may advertise a filter as “verified,” even though it has not been verified by CARB. Make sure the suggested filter is on the list of currently verified equipment before buying. Click on the yellow button for the list.

Also see ARB's handbook: A Truck Driver’s Guide to Care and Maintenance of Diesel Particulate Filters.

See our TruckStop Enforcement and Helpful Videos Webpages.
Also see our list of training courses on diesel regulations, reporting, and compliance including the newer How to Comply Course - 520!

The purpose of this website is to assist the user in identifying legal requirements that may apply based on information submitted by the user. This website may not indicate all legal requirements that may apply. The user should not rely on the presentation of statutes or regulations referenced in this website, but should consult the actual text of each statute or regulation. Legal requirements frequently change and the user should seek the advice of counsel to determine what requirements apply to their situation.