More than 5,300 diesel trucks have been replaced or retrofitted, the state agency said.
The agency modified several regulations related to on- and off-road diesel engines to grant some relief to trucking.
The agency has amended its Transport Refrigeration Unit Airborne Toxic Control Measure to allow 2003 engines to meet a less stringent standard.
The California Air Resources Board is accepting comment on proposed alterations to three truck emissions rules.
California Air Resources Board is considering delaying particulate matter rules from 2011 to 2012 and truck replacement from 2013 to 2015.
California Air Resources Board will enforce the January compliance deadline, but will consider an option for meeting the standard.
Applications for grants worth up to $50,000 toward purchase of a newer truck are expected to open in October.
The state’s Air Resources Board will solicit input on modifying the truck and bus and drayage truck regulations.
Sign up to get Overdrive's daily newsletter.