CARB Withdraws Waiver Requests to Phase-Out Diesel Trucks, Trains, and Harbor Craft

On January 13, 2025, the California Air Resources Board (CARB) withdrew three waiver requests that would have phased-out diesel trucks, trains, and commercial harbor craft by 2036. The diesel truck and locomotive rules were considered the most legally controversial.

The Advanced Clean Fleets (ACF) regulation would have required cargo trucks that serve po…