Transport Refrigeration Unit
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Transportation and Toxics Division
Transport Refrigeration Units (TRU) are refrigeration systems powered by diesel internal combustion engines designed to refrigerate or heat perishable products that are transported in various containers, including truck vans, semi-truck trailers, shipping containers, and railcars.
More about this program
2022 Amendments to the TRU ATCM
New amendments to the TRU ATCM are effective October 1, 2022. CARB staff have prepared a Regulatory Advisory on the 2022 Amendments (Español) to assist with the new requirements. Additional implementation-related information is available on the TRU Compliance Information Webpage, including a Frequently Asked Questions (Español) document.