Withdrawal of request for EPA waiver means the state no longer seeks to enforce its zero emission vehicle mandate on fleets.

California has decided to abandon its phase out of diesel trucks and requiring cleaner locomotives because of the incoming Trump administration.

In order for California to promulgate vehicle emission standards without violating the Clean Air Act, it must receive a waiver from the EPA for any state law that regulates vehicles covered by the Act ...

California withdrew plans for pioneering clean-air regulations targeting diesel trucks and trains on January 14, citing ...

Truckers see the withdrawal of the state rule as a sign of more rollbacks of emissions rules as the Trump administration ...