Includes bibliographical references.

Summary -- Introduction -- Vehicle fundamentals, fuel consumption, and emissions -- Review of current regulatory approaches for trucks and cars -- Power train technologies for reducing load-specific fuel consumption -- Vehicle technologies for reducing load-specific fuel consumption -- Costs and benefits of integrating fuel consumption reduction technologies into medium- and heavy-duty vehicles -- Alternative approaches to reducing fuel consumption in medium- and heavy-duty vehicles -- Approaches to fuel economy and regulations -- Appendixes: A. Statement of task; B. Presentations and committee meetings; C. Committee biographical sketches; D. Abbreviations and acronyms; E. Fuel economy and fuel consumption as metrics to judge the fuel efficiency of vehicles; F. Details of aerodynamic trailer device technology; G. Vehicle simulation; H. Model-based design. Introduction -- Vehicle fundamentals, fuel consumption, and emissions -- Review of current regulatory approaches for trucks and cars -- Power train technologies for reducing load-specific fuel consumption -- Vehicle technologies for reducing load-specific fuel consumption -- Costs and benefits of integrating fuel consumption reduction technologies into medium- and heavy-duty vehicles -- Alternative approaches to reducing fuel consumption in medium- and heavy-duty vehicles -- Approaches to fuel economy and regulations -- Appendixes: A. Statement of task; B. Presentations and committee meetings; C. Committee biographical sketches; D. Abbreviations and acronyms; E. Fuel economy and fuel consumption as metrics to judge the fuel efficiency of vehicles; F. Details of aerodynamic trailer device technology; G. Vehicle simulation; H. Model-based design.