Zeroing In On: ZETs
May 2023 Market Update

The third publication in CALSTART’s Zeroing in on Zero-Emission Trucks series, this market update highlights the continued increase in medium- and heavy-duty (MHD) zero-emission truck (ZET) deployments in the United States. Providing a concise and current snapshot of the dynamic U.S. MHD truck market (Class 2b–8), it presents deployment statistics for ZETs and characterizes the existing U.S. MHD truck market as of December 2022. This analysis offers insights into state-specific markets that can help inform policymakers, original equipment manufacturers, and fleet owners of both market and policy opportunities for future ZET deployments. Some key findings include the following:

  • Since January 2017, annual MHD ZET deployments increased year-over-year by 104% in 2018, 23% in 2019, 60% in 2020, 397% in 2021, and 163% in 2022.
  • Cumulative U.S. MHD ZET deployments (from January 2017 through December 2022) has grown to 5,483 vehicles. Of MHD ZETs with known locations, 59% were deployed in states that have adopted the Advanced Clean Trucks (ACT) rule as of December 2022.
  • In 2022 alone, 3,510 MHD ZETs were deployed across the country, surpassing deployments of the previous five years (2017–2021) combined.
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