What is Clean Truck Check-CARB

Under the Clean Air Act, the California Air Resources Board (CARB) is tasked with developing statewide programs and strategies to reduce smog-forming and toxic pollutants emitted from mobile sources. This includes addressing the significant contribution of heavy-duty diesel vehicles weighing over 14,000 pounds to California's air quality challenges.

Why are heavy-duty diesel vehicles a major concern for California's air quality?

Despite CARB's efforts over the past four decades to reduce nitrogen oxide (NOx) and particulate matter (PM 2.5) emissions from heavy-duty diesel vehicles, these vehicles still account for the majority of on-road NOx and PM 2.5 emissions in the state. This poses a serious threat to public health and the environment.

What measures has CARB implemented to address heavy-duty diesel vehicle emissions?

CARB has implemented various regulations and programs to tackle emissions from heavy-duty diesel vehicles. These include setting new engine standards, requiring manufacturer warranties and durability for emission control components, and implementing in-use truck rules to accelerate fleet turnover. Additionally, CARB has introduced incentive programs to encourage the adoption of low- and zero-emission technologies in the heavy-duty sector.

What are the challenges in reducing emissions from heavy-duty diesel vehicles?

Despite CARB's efforts, reducing emissions from heavy-duty diesel vehicles remains a complex challenge. Factors such as the long lifespan of these vehicles, the high cost of transitioning to cleaner technologies, and the sheer number of heavy-duty vehicles on California's roads all contribute to the difficulty of achieving significant emission reductions in this sector.

It is clear that addressing emissions from heavy-duty diesel vehicles is crucial in improving California's air quality and protecting public health. CARB continues to work towards innovative solutions and strategies to reduce emissions from this sector and meet the state's air quality goals.

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