California's Clean Truck Check: Moving Heavy-duty Vehicles Towards a Cleaner Future
To stay updated on Clean Truck Check, visit the TruckStop website , subscribe to the CARB GovDelivery email list, and follow CARB TruckStop on X (formerly known as Twitter) @CARBTruckStop . Despite comprising only about 3% of California's total on-road vehicle fleet, heavy-duty vehicles play a significant role in statewide mobile air pollution. In 2020, they were responsible for approximately 52% of on-road mobile source oxides of nitrogen (NOx) emissions and 54% of on-road mobile source particulate matter (PM) 2.5 emissions. About 70% of Californians live in areas that exceed the federal ozone and PM 2.5 standards (CARB, 2020d). These emissions pose serious threats to human health and the environment. Exposure to PM or ozone can lead to severe adverse health effects, including asthma, cardiopulmonary and respiratory diseases, and premature deaths. Clean Truck Check (formerly known as the Heavy-Duty Inspection and Maintenance Program) was approved by the California Air Resour