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Iowa is leading 19 states in a lawsuit against the U.S. Environmental Protection Agency for backing California’s future ban on heavy diesel vehicles.

Clean transportation advocates are in a race to transform the trucking industry in California to meet a mandate requiring zero-emission vehicles by 2035, and the challenges are many.

The California Air Resources Board approved its Advanced Clean Fleets regulation that will require some motor carriers to begin the transition to zero-emission trucks as soon as next year.

Toyota is to begin offering Class 8 commercial truck manufacturers and operators a hydrogen-fueled powertrain in California later this year.

The California Air Resources Board is making plans to modify its proposed Advanced Clean Fleets regulation to address possible electric charging infrastructure delays and unavailability of models of zero-emission trucks.

The California Air Resources Board is allowing fleets flexibility with some reporting requirements mandated under its Advanced Clean Fleets rule, which is set to take effect this year.

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The Truck and Engine Manufacturers Association has withdrawn its lawsuit alleging that California environmental regulators did not give truck manufacturers enough lead time to meet the state’s new, more rigid emission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