Diesel Truck & CARB Regulations

The Truck and Bus Regulation applies to privately and federally owned diesel trucks and buses that operate in California.

Need help finding information about the State Air Resources Board (CARB) On-Road Truck Regulations? Telephone the CARB Hotline number: 866-634-3735 (866-6Diesel) and talk with a live person, or go on line at CARB website link The Truck Stop  or The Truck and Bus Regulation Web page

Questions and Answers:

Fact Sheets and Frequently Asked Questions can be found here.

Most of the fact sheets have been updated to reflect the 2014 amendments and are available at:
http://www.arb.ca.gov/msprog/onrdiesel/documents.php. If you need help with reporting after reading the Online User Guide, please call or email the Diesel Hotline at 866-634-3735 or 866diesel@arb.ca.gov or visit http://www.arb.ca.gov/dieseltruck for additional information.

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