Truck and Bus Regulations - Compliance Requirements

The California Air Resources Board approved the Truck and Bus Regulation to significantly reduce particulate matter from existing diesel vehicles operating in California.

What vehicles are affected by the truck and bus regulation?

The regulations applies to nearly all diesel fueled trucks and buses with a gross vehicle weight rating (GVWR) greater than 14,000 pounds that are privately or federally owned and for privately and publicly owned school buses.

Lighter Truck Requirements

Lighter trucks and buses with a GVWR of 14,000 to 26,000 pounds would not have compliance requirements until 2015. The Compliance Schedule for Lighter Trucks table lists the compliance dates that would apply by engine model year for lighter trucks.

Heavier Truck and Bus Requirements

Heavier trucks and buses with a GVWR greater than 26,000 pounds would have two primary ways to comply. Fleets can comply with the compliance schedule by engine model year or could usa a phase-in option that is more flexible.

Heavier trucks would be required to meet the compliance schedule shown below. Fleets that comply with the schedule would install the best available PM filter on 1996 model year and newer engines and would replace the vehicle 8 years later.

Phase-In Option for Heavier Trucks

In addition, there is a phase-in option that allows fleets to decide which vehicles to retrofit or replace, regardless of engine model year. Fleets must report information about all of their heavier trucks starting January 31, 2012, to use this option

Fleets comply by demonstrating they have met the percentage requirement each year as showing in the Phase-In Option for Heavier Trucks table.