Clean Truck Check, formerly known as the Heavy-Duty Inspection and Maintenance Program, was approved by the California Air Resources Board (CARB) in 2021. The program ensures heavy-duty vehicles operating in California are well-maintained and repaired quickly when needed to reduce emissions and improve public health statewide, especially in disadvantaged communities disproportionately impacted by air pollution. It also provides a level playing field for the businesses that operate these vehicles as it applies to both in-state and out-of-state registered heavy-duty vehicles. The program includes nearly all non-gasoline vehicles with a gross vehicle weight rating over 14,000 pounds that operate in California. This includes public vehicles, trucks, buses, personal vehicles, California-registered motorhomes, single vehicle fleets, and vehicles registered outside of California (not including motorhomes). | 
