Zero-Emission Truck Regulation—Advanced Clean Fleets—to be Considered by CARB Board on October 27, 2022, in First of Two Hearings

The California Air Resources Board (CARB or Board) continues its work to cut emissions from polluting trucks, especially those that run in or near communities. In the first of two hearings, the Board will consider the proposed Advanced Clean Fleets regulation on October 27, 2022, and they would like your input.

The proposed Advanced Clean Fleets regulation would, over time, require certain truck fleet types to replace their diesel and other combustion medium- and heavy-duty vehicles with zero-emission vehicles. These battery-electric and fuel cell electric vehicles produce no tailpipe emissions, reduce brake wear, and, in general, have lower life cycle greenhouse gas emissions compared to diesel and other combustion fuels. In contrast, medium- and heavy-duty diesel trucks contribute 80 percent of the State’s diesel pollution and 50 percent of smog-causing pollution in California, while making up less than 7 percent of all the vehicles on the road.

The proposed Advanced Clean Fleets regulation would help reduce emissions from fleets that pose acute health risks to the local communities in which they operate, and would contribute towards achieving CARB’s emissions reduction goals for attaining federal health-based air quality standards and the State’s greenhouse gas reduction goals. The statewide benefits of the proposed Advanced Clean Fleets regulation, cumulative through 2050, include:
  • $57.8 billion in savings from avoided cardiopulmonary and other health benefits
  • $9.4 to $36.4 billion in savings from the social costs of carbon

  • $22.2 billion in net cost-savings to fleets

  • 419,000 tons of oxides of nitrogen (NOx) reduced

  • 2,540 avoided emergency room visits for asthma

  • 1,040 avoided hospital admissions for respiratory illness

  • 873 avoided hospital admissions for cardiovascular illness

  • 5,520 avoided cardiopulmonary deaths

  • 307 million metric tons of greenhouse gases reduced

  • 8,640 tons of fine particulate matter (PM2.5) reduced

The proposed Advanced Clean Fleets regulation requires medium- and heavy-duty vehicle manufacturers to sell only zero-emission vehicles starting in 2040, and requires three groups of truck fleet types to purchase an increasing percentage of zero‑emission vehicles over time. 
  • State and local agencies. Fleets owned by such California government agencies as cities, counties, public utilities, districts, and the State, would be required to ensure that 50 percent of vehicle purchases are zero-emission beginning in 2024, and 100 percent of vehicle purchases are zero-emission by 2027.
  • Drayage fleets. Fleets with vehicles that visit ports and railyards, starting 2024, can add only zero-emission trucks to their fleets, and legacy vehicles must be removed from drayage service at the end of their useful life. By 2035, all drayage trucks must be zero-emission.
  • High priority and federal fleets. Federal government agencies that own, operate, or direct one or more affected vehicles in California; private companies with more than $50 million in annual revenue and that own, operate, or direct one or more vehicles in California; or private companies that own, operate, or direct under common ownership or control 50 or more trucks or off-road yard tractors per year must comply with a Model Year Schedule by purchasing only zero-emission vehicles beginning 2024 and removing internal combustion engine vehicles at the end of their useful life; or they may elect to use the optional Zero-Emission Vehicle Milestone Schedule to bring zero-emission vehicles into their fleets over time, starting in 2025, 2027, or 2030, depending on vehicle type. Under this Milestone Schedule, fleets would be required to be 100 percent zero-emission by 2035, 2039, or 2042, again, depending on vehicle type.
This proposed Advanced Clean Fleets regulation comes on the heels of the Advanced Clean Trucks regulation that was approved in March 2021, requiring truck manufacturers to increase the percentage of their sales of zero-emission trucks starting in 2024 through 2035. Percentages vary by truck weight class and go up to a 75 percent sales requirement for Class 4 – 8 straight trucks by 2035 and beyond. The Advanced Clean Trucks regulation provides the supply of zero-emission trucks in California, and the Advanced Clean Fleets regulation provides the demand for those trucks. Together, they are projected to result in about 510,000, 1,230,000, and 1,590,000 medium- and heavy-duty zero-emission vehicles in California in 2035, 2045, and 2050, respectively. The benefits of California’s Advanced Clean Trucks regulation have multiplied because it has already been adopted by 5 additional states, resulting in 20 percent of the U.S. truck market going zero-emissions. This will ensure that more communities benefit from the cleaner air and resulting health benefits, fleets benefit from the net-cost savings these trucks provide, and the world will benefit from the reduction in climate-changing, greenhouse gas emissions.

The Board wants to hear from everyone that might be affected by the proposed Advanced Clean Fleets regulation. You can read and comment on the draft regulation language—see the Advanced Clean Fleets program webpage. Also, check out the factsheets that summarize the regulation, and stay informed about upcoming events by subscribing to CARB’s ZEV Fleet GovDelivery email list. You can access the October 27, 2022, Board hearing by webcast or you can attend in person in Sacramento. Click here for more information about this or other Board hearings.