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. This study 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.
On September 15, 2011, NHTSA and EPA finalized joint Phase I rules to establish a comprehensive Heavy-Duty National Program to reduce greenhouse gas emissions and fuel consumption for on-road medium- and heavy-duty vehicles. As NHTSA and EPA began working on a second round of standards, the National Academies issued another report, Reducing the Fuel Consumption and Greenhouse Gas Emissions of Medium- and Heavy-Duty Vehicles, Phase Two: First Report, providing recommendations for the Phase II standards. This third and final report focuses on a possible third phase of regulations to be promulgated by these agencies in the next decade.
Table of Contents
|2 Setting the Stage: Regulatory Horizons, Challenges, and Influences||17-45|
|3 Certification, Compliance, and Enforcement||46-63|
|4 Powertrain Technologies||64-124|
|5 Technologies for Reducing the Power Demand of MHDVs||125-172|
|6 Projected Benefits of Technologies on Fuel Consumption||173-200|
|7 Hybrid and Electric Powertrain Technologies||201-232|
|8 Battery Technology for Medium- and Heavy-Duty Hybrid and Electric Vehicles||233-258|
|9 Freight Operational Efficiency||259-269|
|10 Intelligent Transportation Systems and Automation||270-276|
|11 Manufacturing Considerations||277-289|
|12 Costs and Benefits||290-322|
|13 Alternative and Complementary Regulatory Approaches||323-342|
|Appendix A: Committee Biographies||343-348|
|Appendix B: Disclosure of Conflicts of Interest||349-349|
|Appendix C: Committee Activities||350-355|
|Appendix D: Summary of Analysis of Engine and Vehicle Combinations||356-359|
|Appendix E: Description of Drive Cycles Used for Compliance||360-366|
|Appendix F: Summary of Committee's First Report: Reducing the Fuel Consumption and Greenhouse Gas Emissions of Medium- and Heavy-Duty Vehicles, Phase Two: First Report||367-373|
|Appendix G: Acronyms and Abbreviations||374-380|
During this report release webinar, the study chair and committee members discuss the key findings and recommendations in the report.
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