California is deploying a portable emissions detector in areas with heavy truck traffic to educate drivers and operators about a new smog check program that starts Jan. 1.

All original equipment manufacturers approve the use of a B5 biodiesel blend, while the B20 blend is most common.

The California Air Resources Board has released a greenhouse gas emissions report showing a 33% drop in carbon pollution since 2001 that was achieved through a combination of tactics including expanded use of biodiesel and renewable diesel in heavy-duty trucks, greater use of electric vehicles and more fuel-efficient passenger vehicles.

The Truck and Engine Manufacturers Association has withdrawn its lawsuit alleging that California environmental regulators did not give truck manufacturers enough lead time to meet the state’s new, more rigid emission standards.

Toyota Motor Corp. agreed to recognize California’s authority to set its own auto emission standards, ending a standoff stretching back to the Trump administration.

Steven Cliff, the head of the National Highway Traffic Safety Administration, is stepping down from his post for a leadership role at the California Air Resources Board.

A recent U.S. Environmental Protection Agency hearing focused on the California Air Resources Board's bid to proceed with three aggressive regulations that have not been well-received within the trucking industry.

WASHINGTON — Trucking companies should educate California regulators about potential impacts of a new regulation before it takes effect and becomes a model for the nation, according to fleet experts.

The Truck and Engine Manufacturers Association filed a federal lawsuit May 27 alleging that California environmental regulators have failed to give manufacturers enough lead time to meet the state’s new, more rigid emission standards.

American Trucking Associations is among the groups proposing that the California Air Resources Board consider supply chain pressures for granting the industry alternatives to certain regulatory compliance.