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ACKNOWLEDGMENTS . . . e e · e e · e e e e e e e · e e e e · e e e e e e · e e e e e e e e e e e e e e e e e e ABSTRACT e e e e e e · e e e e e e e e e e e e e e e e e e e e e SUMMARY e e e e e e e e e e e e e e e e e e e e e e e e e e e e e e e · · e e e e e e e e e e e e · e e e e e e e e e e e e GLOSSARY e e e e e e e e e e e e CHAPTER ~ Introduction and Research Approach Operational Problem Research Objective Research Approach CHAPTER 2 Findin~s e e e e e C, Summary of Existing Conditions Survey of Existing Traffic Models Field Studies Capacity Character~stics Traff~c Control, Spiliback and Performance Ader~al Weaving Speed Ramp Weaving Capacity Mode! CHAPTER 3 Interpretation, Appraisal, Applications Capacity Characteristics Interchange Capacity Estimation Methodology Recommended Changes to the Highway Capacity Manual Descr~ption of Software Needed for Implementation Signal Timing Improvements for Closely Spaced Intersections Artenal Weav~ng Speed Analysis Methodology Ramp Capacity Analysis Methodology CHAPTER 4 Conclusions and Recommendations . . . . . . Conclusions Recommendations REFERENCES . . . .. . . . . APPENDIX A APPENDIX B APPENDIX C APPENDIX D APPENDIX E APPENDIX F State-Of-The-Art Field Study Data Collection and Reduction ..................... Capacity Characteristics for Interchanges and Closely-Spaced Intersections Closely-Spaced Intersection Flow Models . . ... . . .. . ... . . .. .. .. . A~en~ Weaving Speed Models .................. Develooment of INTERCHANGE AnalYsis Software . . . ~gg iV V Vl X 1-1 1-1 1-2 1-3 2-1 2-1 2-6 2-13 2-24 2-42 2-57 2-61 3-1 3-1 3-11 3-20 3-31 3-33 3-35 3-39 4-1 4-1 4-3 4-5 A-1 B-1 C-1 D-1 E-1 F-1