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B Statement of Task 1. The committee will review the NHTSA fuel consump- 3. The committee will review an updated analysis of tion regulations promulgated on 15 September 2011 the makeup and characterization of the medium- and (76 Federal Register 57106) and consider the techno- heavy-duty truck fleet, including combination tractors, logical, market and regulatory factors that may be of trailers, busses and vocational vehicles. The commit- relevance to a revised and updated regulatory regime tee also will review the methodology for providing taking effect for model years 2019-2022. This review on-road information on fuel consumption. will include, but not be limited to, the potential for 4. The committee will examine the barriers to and the technological change in commercial vehicles in MY potential applications of natural gas in class 2b through 2019-2022 and the impact it might have on the regula- class 8 vehicles. The committee will consider how such tory regime. Also as part of its review, the committee vehicles could be included in the framework on fuel will explore regulatory options for trailers. consumption regulations. 2. The committee will analyze and provide options for 5. The committee will address uncertainties and perform improvements to the certification and compliance sensitivity analyses for the fuel consumption and cost/ procedures for medium- and heavy-duty vehicles— benefit estimates, to the extent possible, and provide including the use of representative test cycles and guidance to NHTSA on improving its uncertainty simulation using various models—such as might be analyses given the relatively long time frame for these implemented in revised fuel consumption regulations future estimates. affecting MY 2019-2022. 97