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CARB Explains New Diesel Rules to Fleets

The California Air Resources Board (CARB) held its Diesel Truck Regulation Information Session and Conference in Los Angeles on Tuesday to inform fleets about on diesel engines and how to maintain compliance.

February 26, 2015
CARB Explains New Diesel Rules to Fleets

Members of the CARB enforcement division conducted a truck inspection demonstration as part of the Periodic Smoke Inspection Program (PSIP). The equipment measures smoke opacity from the tailpipe of diesel trucks with GVWRs greater than 14,000 lbs. The CARB randomly audits fleets on the road and at businesses.

Photo: Chris Brown

1 min to read


The California Air Resources Board (CARB) held its Diesel Truck Regulation Information Session and Conference in Los Angeles on Tuesday Feb. 24 at the Los Angeles Trade Tech College.

The event was held to inform fleets about current rules on diesel engines and explain how to maintain compliance.

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Discussions included information about truck and bus regulatory requirements, funding opportunities and enforcement. Local agencies including air districts, the California Highway Patrol and equipment vendors participated.

The CARB Truck and Bus Regulations affect owners and operators of vehicles with a gross vehicle weight rating (GVWR) greater than 14,000 lbs. that use diesel fuel and travel in California. The rules require that trucks with engine years of 2009 or older be replaced or retrofit with diesel particulate filters on a schedule from Jan. 1, 2015 through 2023.

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