FrontMatter -- Preface -- Acknowledgments -- Contents -- Summary -- 1 Introduction -- 2 End User Needs -- 3 Science and Technology -- 4 Future Directions -- References -- Appendixes -- Appendix A: Extended Speaker Abstracts -- Appendix B: The Dallas-Fort Worth Urban Testbed -- Appendix C: Workshop Information -- Appendix D: Statement of Task -- Appendix E: Acronym List -- Appendix F: Committee and Staff Biographical Sketches.