Suggested Citation:
Miller, Marshall and Lewis Fulton (2026)

Brief: Tracking the Transition: Why California Needs a Central Database for Zero-Emission Trucks

. Institute of Transportation Studies, University of California, Davis, Brief UCD-ITS-RR-26-29

Abstract:

California has set some of the most ambitious clean-truck goals in the world. Governor Newsom’s 2020 Executive Order includes a goal that all medium- and heavy-duty trucks be zero-emission by 2045 where feasible. To meet this goal, the California Air Resources Board (CARB) approved two regulations focusing on trucks—the Advanced Clean Trucks rule, requiring manufacturers to sell zero-emission trucks (ZETs), and the Advanced Clean Fleets rule, requiring fleets to purchase them. Both rules are not currently active, but the targets and aggressive schedules for ZET adoption re-main. This situation creates uncertainty for manufacturers, fleets, and infrastructure providers.