CARB To Relax Truck NOx Rules To Address Possible MY24-26 Shortage

California air regulators are planning to relax their landmark heavy truck low-nitrogen oxide (NOx) “omnibus” standards for model year 2024-26 vehicles, in response to reports that major manufacturers do not plan to offer new trucks that meet those limits and are focusing on achieving tougher MY27 limits as well as rules requiring zero-emission models. “Unanticipated changes in product lines may indicate the need for additional legacy engines beyond current production caps and/or need for provisions to mitigate the incremental cost...