METRO UNION DIVISION BUS MAINTENANCE & OPERATIONS FACILITY PROJECT DRAFT INITIAL STUDY/ MITIGATED NEGATIVE DECLARATION VOLUME II - APPENDICES LOS ANGELES COUNTY METROPOLITAN TRANSPORTATION AUTHORITY AUGUST 2008 APPENDIX A Traffic Impact Analysis DRAFT REPORT Metro Union Division Bus Maintenance and Operations Facility Traffic Impact Analysis Prepared for Los Angeles County Metropolitan Transportation Authority (Metro) Prepared by Meyer, Mohaddes Associates 707 Wilshire Boulevard, Suite 4810 Los Angeles, CA 90017 August 20, 2008 J06-9001 Metro Union Division Bus Maintenance and Operations Facility - Traffic Impact Analysis Draft Report TABLE OF CONTENTS INTRODUCTION ....................................................................................................................................................... 1 Project Description ........................................................................................................................................................ 1 EXISTING CONDITIONS ......................................................................................................................................... 5 Existing Roadway Conditions ....................................................................................................................................... 5 Existing Transit Service ................................................................................................................................................. 9 Traffic Operations Analysis Methodology .................................................................................................................... 9 Existing Traffic Operations Analysis .......................................................................................................................... 10 FUTURE WITHOUT PROJECT CONDITIONS .................................................................................................. 12 Ambient Traffic Growth .............................................................................................................................................. 12 Cumulative Project Growth ......................................................................................................................................... 12 Future Without Project Traffic Analysis ..................................................................................................................... 12 FUTURE WITH PROJECT CONDITIONS .......................................................................................................... 18 Project Trip Generation ............................................................................................................................................... 18 Project Trip Distribution and Assignment ................................................................................................................... 19 Level of Service Threshold Criteria ............................................................................................................................. 23 Future With Project Traffic Impact Analysis ............................................................................................................... 24 Future With Project Mitigated Conditions ................................................................................................................... 25 SITE ACCESS ANALYSIS ...................................................................................................................................... 27 Employee Access Analysis .......................................................................................................................................... 27 Bus Access Analysis .................................................................................................................................................... 27 CONGESTION MANAGEMENT PROGRAM SYSTEM ANALYSIS ............................................................... 26 Appendix A – Memorandum of Understanding (MOU) Appendix B – Existing Traffic Counts Appendix C – Level of Service Analysis Worksheets i Iteris, Inc. Metro Union Division Bus Maintenance and Operations Facility - Traffic Impact Analysis Draft Report LIST OF FIGURES Figure 1: Project Study Area ......................................................................................................................................... 2 Figure 2: Conceptual Site Plan ...................................................................................................................................... 3 Figure 3: Study Intersection Lane Configurations ......................................................................................................... 6 Figure 4: Existing AM and PM Peak Hour Volumes .................................................................................................... 7 Figure 5: Related Project Locations............................................................................................................................. 14 Figure 6: Related Projects Trip Assignment ................................................................................................................ 15 Figure 7: Future without Project AM and PM Peak Hour Traffic Volumes ................................................................ 17 Figure 8: Bus Trip Distribution .................................................................................................................................. 20 Figure 9: Employee Trip Distribution ......................................................................................................................... 21 Figure 10: Project Trip Assignment............................................................................................................................. 22 Figure 11: Future With Project AM and PM Peak Hour Traffic Volumes .................................................................. 24 Figure 12: Proposed Project Mitigation ....................................................................................................................... 26 ii Iteris, Inc. Metro Union Division Bus Maintenance and Operations Facility - Traffic Impact Analysis Draft Report LIST OF TABLES Table 1: Intersection Level of Service Definitions ...................................................................................................... 10 Table 2: LOS Analysis - Existing Conditions.............................................................................................................. 11 Table 3: Related Projects Trip Generation Estimates .................................................................................................. 13 Table 4: LOS Analysis - Future Without Project Conditions ...................................................................................... 16 Table 5: Division 10 Project Trips ............................................................................................................................... 18 Table 6: Union Division Project Trips ......................................................................................................................... 18 Table 7: Union Division Adjusted Project Trips ......................................................................................................... 19 Table 8: Total Project Trip Generation Estimate ......................................................................................................... 20 Table 9: Proposed Bus Routes Operating from Union Division .................................................................................. 20 Table 10: LOS Analysis - Future With Project Conditions ......................................................................................... 23 Table 11: LOS Analysis - Future With Project Mitigated Conditions ......................................................................... 25 iii Iteris, Inc. Metro Union Division Bus Maintenance and Operations Facility - Traffic Impact Analysis Draft Report INTRODUCTION This report summarizes the results of a traffic impact study that was undertaken for the proposed Los Angeles County Metropolitan Transportation Authority (Metro) Union Division Bus Maintenance Facility located in the City of Los Angeles. The report summarizes the methodology, findings and conclusions of the traffic impact analysis. A total of eleven (11) key intersections in the vicinity of the project site were analyzed. The traffic study assesses the effects of the additional trips expected to be generated by the construction of the proposed maintenance facility. The traffic impact analysis also takes into account other traffic growth due to specific development projects in the surrounding area and overall ambient growth in background traffic. Project Description The project site is located at 920 North Vignes Street in the northeast corner of the Vignes Street and Cesar Chavez Avenue intersection, as shown in Figure 1. The site consists of approximately six acres and the maintenance facility would replace the former Terminal 31 site and the employee parking lot at Metro’s Regional Rebuild Center (RRC) and the expansion of RRC Building 1. The segment of Lyon Street located north of Cesar Chavez would also be vacated as a part of the project. The new facility would include a two-story bus maintenance facility, consisting of approximately 360,000 square feet including some office space, and a three-story parking structure. The facility would