CARB Floats Plan To Limit Truck NOx But Hedges On Long-Term Targets

California air regulators are floating a phased approach for implementing tougher nitrogen oxide (NOx) limits for heavy-duty trucks, including stricter numerical standards starting in model year 2024 and regulatory timelines that are synchronized with greenhouse gas controls -- though they are hedging on long-term NOx targets. The policy options are included in a new California Air Resources Board (CARB) staff paper, though it is not clear whether the paper will blunt -- or instead drive -- a clash between the...