CARB Mandates Zero-Emission Medium, Heavy-Duty Vehicles

The California Air Resources Board (CARB) today approved a first-of-its-kind rule that requires a phased-in transition toward zero-emission medium- and heavy-duty vehicles, aka ZEVs. Trucks represent only 6% of the vehicles on California’s roads. However, CARB noted that they account for more than 35% of the state’s transportation generated nitrogen oxide emissions, and 25% of the state’s on-road greenhouse gas emissions.

“We have the technology available to start working toward a zero-emission future now,” said CARB Chair Liane Randolph. “The Advanced Clean Fleets rule is a reasonable and innovative approach to clean up the vehicles on our roads and ensure that Californians have the clean air that they want and deserve. At the same time, this rule provides manufacturers, truck owners and fueling providers the assurance that there will be a market and the demand for zero-emissions vehicles, while providing a flexible path to making the transition toward clean air.”

California communities that sit near trucking corridors and warehouse locations with heavy truck traffic have some of the worst air in the nation. California is set to invest almost $3 billion between 2021 – 2025 in zero-emission trucks and infrastructure. This investment is a part of a $9 billion multi-year, multi-agency zero-emissions vehicle package to equitably de-carbonize the transportation sector that was agreed upon by the Governor and the Legislature in 2021.

Under the new rule, fleet owners operating vehicles for private services, such as last-mile delivery and federal fleets such as the Postal Service, along with state and local government fleets, will begin their transition toward zero-emission vehicles starting in 2024.

The rule includes the ability to continue operating existing vehicles through their useful life. Due to the impact that truck traffic has on residents living near heavily trafficked corridors, drayage trucks will need to be zero-emissions by 2035.

All other fleet owners will have the option to transition a percentage of their vehicles to meet expected zero-emission milestones, which gives owners the flexibility to continue operating combustion-powered vehicles as needed during the move to ZEV technology.

“The flexibility is intended to take into consideration the available technology and the need to target the highest-polluting vehicles. For example, last mile delivery and yard trucks must transition by 2035, work trucks and day cab tractors must be zero-emission by 2039, and sleeper cab tractors and specialty vehicles must be zero-emission by 2042,” CARB said.

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