CARB May Relax Compliance For Certain Fleet Types

A proposal by the staff of California’s Air Resources Board (CARB) would provide "lower-cost compliance options" for certain types of truck operations as the agency continues the rollout of its strict emission rules for "in-use heavy-duty diesel-fueled vehicles."

CARB has advised that its staff will present to the Board amendments that would "better ensure that the air-quality goals of the Truck and Bus Regulation are achieved by providing additional flexibility to fleets to enable compliance."

California’s existing Truck and Bus Regulation required that, effective 01/01/12, fleets  "install starting PM (particulate-matter) filters for certain engine model years and to begin accelerating engine or vehicle replacement starting 01/01/15 for their heavier trucks...(and that) after 2014, fleets are required to phase in additional 2010 model year or newer engines such that, by 2023, all engines operating in California and subject to the regulation will be model year 2010 or newer."

The agency also noted that, under the current rule, there are "several compliance options for fleets to choose from, and some fleets may change compliance options from one year to the next."

CARB said that in developing the amendments to be discussed this week, its staff focused on three objectives:
Aiming to "achieve these objectives and benefits," the CARB staff said it will propose amendments to the Truck and Bus regulation that include: