Medium- and heavy-duty trucks, motor coaches, and transit buses - collectively, "medium- and heavy-duty vehicles", or MHDVs - are used in every sector of the economy. The fuel consumption and greenhouse gas emissions of MHDVs have become a focus of legislative and regulatory action in the past few years. Reducing the Fuel Consumption and Greenhouse Gas Emissions of Medium- and Heavy-Duty Vehicles, Phase Two is a follow-on to the National Research Council's 2010 report, Technologies and Approaches to Reducing the Fuel Consumption of Medium-and Heavy-Duty Vehicles. That report provided a series of findings and recommendations on the development of regulations for reducing fuel consumption of MHDVs.
This report comprises the first periodic, five-year follow-on to the 2010 report. Reducing the Fuel Consumption and Greenhouse Gas Emissions of Medium- and Heavy-Duty Vehicles, Phase Two reviews NHTSA fuel consumption regulations and considers the technological, market and regulatory factors that may be of relevance to a revised and updated regulatory regime taking effect for model years 2019-2022. The report analyzes and provides options for improvements to the certification and compliance procedures for medium- and heavy-duty vehicles; reviews an updated analysis of the makeup and characterization of the medium- and heavy-duty truck fleet; examines the barriers to and the potential applications of natural gas in class 2b through class 8 vehicles; and addresses uncertainties and performs sensitivity analyses for the fuel consumption and cost/benefit estimates.
Transportation Research Board and National Research Council. 2014. Reducing the Fuel Consumption and Greenhouse Gas Emissions of Medium- and Heavy-Duty Vehicles, Phase Two: First Report. Washington, DC: The National Academies Press. https://doi.org/10.17226/18736.
|2 Potential for Technological Change in Commercial Vehicles to Impact Future NHTSA Regulations||23-28|
|3 Certification and Compliance Procedures Using GEM||29-39|
|4 Baseline Information on MHDV Fleet and Methodology for Collection||40-51|
|5 Natural Gas Vehicles: Impacts and Regulatory Framework(||52-66|
|6 Review of Options to Reduce Energy Use of Trailers||67-88|
|Appendix A: Committee Biographical Information||91-96|
|Appendix B: Statement of Task||97-97|
|Appendix C: Committee Activities||98-99|
|Appendix D: Acronyms and Abbreviations||100-101|
|Appendix E: Glossary||102-102|
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