Methods for Assessing Technology and Market Readiness
for Clean Commercial Transportation

Revised in October 2023

Each year, CALSTART and the California Air Resources Board (CARB) conduct technology status and market readiness snapshot assessments to analyze the technology and market progress of zero-emission medium- and heavy-duty (ZE MHD) vehicle and equipment technologies. This report explains the methods and process used to create and update these assessments, which depict a comprehensive view of ZE MHD vehicle and equipment platform performance and readiness for the marketplace. This report will be updated on a periodic basis in support of the publication of CARB’s Appendix D: Long-Term Heavy-Duty Investment Strategy. A previous version of this report was published in October 2022.

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