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ACKNOWLEDGMENTS This research was performed under NCHRP Project 3-47 by the Texas Transportation Institute (TTI), Texas A&M University and the DeparLnent of Civil Engineering, University of Nebraska-LincoIn (UNL). A large number of researchers from both organizations contributed significantly to this research. Dr. Carroll J. Messer, P.E., of TT! served as Principal Investigator. Several other TT} staff made notable contributions to this research. The evaluation of existing computer models described in Chapter 2 was provided by Mr. Torsten Lienau. Mr. Michael D. Lloyd and Mr. Snram Natarajan made major contributions to the experimental design and modeling of ramp/arterial weaving. Mr. Venugopal R. Neerudu conducted many of the statistical analyses presented and developed numerous figures shown. Ms. Sreelanta Nandur~ developed the first Operational computer code for TTI's PDX Mode} and Mr. Yang Ouyang further enhanced and tested it, as described in Appendix D. Mr. Joseph Van Arendonk developed the graphic designs and software code for INTERCHANGE, the interchange database software presented in Appendix F. Dr. James A. Bonneson, P.E., of UNE served as Co-Principal Investigator. The UNE staff members who made significant contributionsto the research include Mr. Joe! W. Fitts arid Mr. James A. KolIbaum. The University of Nebraska's Center for Infrastructure Research provided funding for a state-of-the-art video data collection system that was essential to the field study activity associated with this project. The following individuals and highway agencies were also very helpful in providing site locations and support during the field data collection task: Mr. Richard Berry, Traffic Engineering Division, City of Mesquite, Texas Mr. John Black, Traffic and Transportation Department, City of Richardson, Texas Mr. lack A. Burgess, City of Newark, California Mr. Michael I. Cynecki, Street Transportation Department, City of Phoenix, Arizona Mr. Steven Dana, Deparunent of Transportation, State of Arizona, Phoenix, Arizona Ms. Lynne B. Filson, Public Works Department, City of Antioch, Californna Mr. Glenn Hansen, Deparunent of Public Works, City of Omaha, Nebraska Mr. Garry W. Metcalf, Traffic Engineering Department, City of Overland Park, Kansas Mr. Lynn I. Miller, Department of Transportation, State of California, Oakland, Californua Mr. Bob Simard, Department of Roads, State of Nebraska, Lincoln, Nebraska Mr. lames W. Sparks, Street Transportation Department, City of Phoenix, Arizona Mr. Robert G. Temmennand, Department of Public Works, City of Sunnyvale, California Mr. James E. Tobaben, Deparunent of Transportation, State of Kansas, Topeka, Kansas Mr. John H. Warner, Department of Transportation, State of Arizona, Phoenix, Arizona These individuals assisted in the identification of candidate field study sites and also provided geometric and traffic volume data for these sites. In addition, marry of these agencies graciously provided traffic condo! support et the start and end of each field study. The research teem is grateful to each of these individuals and agencies. 1V