Benefits of adopting California medium- and heavy-duty vehicle regulations
In recent years, the State of California has adopted key regulations to reduce greenhouse gas and criteria pollutant emissions from medium- and heavy-duty vehicles. The Advanced Clean Trucks (ACT) rule requires the sale of between 30% and 50% zero-emission trucks by 2030; the HDV Omnibus rule requires a 90% reduction in NOx emissions from model year 2027 engines; and the California Phase 2 greenhouse gas rule includes efficiency standards for tractor-trailers, which the federal government has not implemented.
In pursuit of air quality and climate goals, more than a dozen U.S. states, the District of Columbia, and recently the Province of Quebec, have joined California in a multi-state effort to require manufacturers to bring zero emission medium- and heavy-duty trucks to market. These sub-national governments, signatories of a Multi-State Medium- and Heavy-Duty Zero Emission Vehicle Memorandum of Understanding (MOU), share a goal of 100% zero emission sales and are working together to further reduce emissions from internal combustion engines. To identify best practices and policy actions, signatories of the MOU, organized by the Northeast States for Coordinated Air Use Management (NESCAUM), recently released a Multi-State Medium- and Heavy-Duty Zero-Emission Vehicle Action Plan.
Under the U.S. Clean Air Act Section 177, states can enact regulations more stringent than federal requirements provided the U.S. Environmental Protection Agency grants California a waiver from federal requirements and states delay implementation by two model years. The data below provides information on the benefits of adopting California heavy-duty vehicle emissions control programs in U.S. states and the District of Columbia. These programs include the Advanced Clean Trucks (ACT) regulation, the Heavy-Duty Omnibus regulation, and full implementation of the California HD Vehicle Greenhouse Gas (GHG) Phase 2 regulation, including requirements on tractor-trailers. Newly included in this analysis is California’s proposed requirement that 100% of new truck sales in 2040 be zero-emission vehicles.
This work includes updates to original analysis ICCT published in 2021.
The related consulting report can be found here.
A fact sheet summarizing the findings can be found here.
A previous version of the fact sheet with results from our 2021 analysis can be found here.
All state-specific data and summary fact sheets can be found below.
Data (Updated 10/29/21)
Data (Updated 10/29/21)