California Air Resources Board

The California Air Resources Board’s (CARB’s) heavy-duty vehicle legacy programs have been focused on reducing combustion emissions. New heavy-duty zero-emission vehicle programs are complementary to these programs and focus on a long-term goal of full transition of the heavy-duty transportation sector to zero-emission technologies. They are part of California’s holistic plan to address challenging mandates and needs for public health protection, and to meet federal air quality standards and climate protection goals. The Innovative Clean Transit Regulation is the first of its kind to support these programs. It was adopted in December 2018 to replace the Fleet Rule for Transit Agencies. The regulation requires all public transit agencies to gradually transition to a 100-percent zero-emission bus fleet and encourages them to provide innovative first and last-mile connectivity and improved mobility for transit riders. This regulation also provides various exemptions and compliance options to provide safeguards and flexibility for transit agencies through this transition.
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