Front Matter -- Acknowledgments -- Contents -- Tables and Figures -- Executive Summary -- 1 Introduction -- 2 Development of Vehicle Subsystems -- 3 Systems Analysis -- 4 Major Crosscutting Issues -- 5 PNGV's Response to the Phase 4 Report -- References -- APPENDIX A Biographical Sketches of Committee Members -- APPENDIX B Letter from PNGV (October 14, 1998) -- APPENDIX C Statement of Task -- APPENDIX D Committee Meetings and Other Activities -- APPENDIX E List of Recommendations -- APPENDIX F United States Council for Automotive Research Consortia -- Acronyms.