APPENDIX G Traffic Study
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APPENDIX G Traffic Study 1100 Corporate Center Drive, Suite 201, Monterey Park, CA 91754 T: 323.260.4703 | F: 323.260.4705 | www.koacorp.com MONTEREY PARK ORANGE ONTARIO SAN DIEGO Traffic Impact Study for City of Los Angeles, Bureau of Sanitation (LASAN) East West Valley Interceptor Sewer Project May 28, 2019 Prepared For: CDM Smith 46 Discovery, Suite 250 Irvine, CA 92618 (949) 752-5452 Prepared by: 1100 Corporate Centeer Drive, Suite 201 Monterey Park, California 91754 (323) 260-4703 JB81140 Table of Contents 1. INTRODUCTION ......................................................................................................................................... 1 1.1 PROJECT LOCATION .................................................................................................................................................................1 1.2 PROJECT DESCRIPTION ..............................................................................................................................................................2 1.3 STUDY SCENARIOS ....................................................................................................................................................................4 1.4 LEVEL OF SERVICE METHODOLOGY ..........................................................................................................................................6 2. PROJECT CONSTRUCTION SUMMARY .................................................................................................... 8 2.1 PROJECT CONSTRUCTION DETAILS ........................................................................................................................................8 2.2 PROJECT SCHEDULE ..................................................................................................................................................................9 3. EXISTING CONDITIONS ........................................................................................................................... 10 3.1 STUDY INTERSECTIONS AND ROADWAY SEGMENTS .......................................................................................................... 10 3.2 EXISTING ROADWAY SYSTEM ............................................................................................................................................... 12 3.3 EXISTING TRANSIT SERVICE ................................................................................................................................................... 12 3.4 EXISTING PEDESTRIAN AND BICYCLE CIRCULATION ............................................................................................................ 13 3.5 EXISTING TRAFFIC SIGNAL SYSTEM ....................................................................................................................................... 14 3.6 EXISTING INTERSECTION LEVELS OF SERVICE ....................................................................................................................... 14 3.7 EXISTING ROADWAY SEGMENT VOLUMES ............................................................................................................................. 18 4. PROJECT CONSTRUCTION PERIOD TRIP GENERATION ...................................................................... 19 4.1 PROJECT TRIP GENERATION METHODOLOGY .................................................................................................................... 19 4.2 PROPOSED CONSTRUCTION METHODS .............................................................................................................................. 20 4.3 CONSTRUCTION PROJECT TRIP DISTRIBUTION .................................................................................................................. 21 5. FUTURE WITHOUT-PROJECT CONDITIONS .......................................................................................... 23 5.1 AMBIENT GROWTH ................................................................................................................................................................ 23 5.2 FUTURE WITHOUT PROJECT INTERSECTION LEVELS OF SERVICE ......................................................................................... 23 5.2 FUTURE WITHOUT PROJECT ROADWAY SEGMENT LEVELS OF SERVICE .............................................................................. 24 6. PROJECT CONSTRUCTION-PERIOD CONDITIONS AND IMPACTS ..................................................... 26 6.1 STUDY INTERSECTION ANALYSIS ........................................................................................................................................... 26 6.2 STUDY ROADWAY SEGMENT ANALYSIS ................................................................................................................................. 27 7. PROJECT TRAFFIC IMPACTS AND MITIGATION MEASURES .............................................................. 29 7.1 DETERMINATION OF TRAFFIC IMPACTS ................................................................................................................................ 29 7.2 PROJECT CONSTRUCTION PERIOD TRAFFIC IMPACTS – STUDY INTERSECTIONS ............................................................. 29 7.3 PROJECT CONSTRUCTION PERIOD TRAFFIC IMPACTS – ROADWAY SEGMENTS............................................................... 30 7.4 PROJECT CONSTRUCTION IMPACTS ON PROPERTY ACCESS............................................................................................... 31 7.5 PROJECT CONSTRUCTION IMPACTS ON BICYCLE/PEDESTRIAN/TRANSIT ACCESS ............................................................. 31 7.6 PROJECT CONSTRUCTION IMPACTS ON ON-STREET PARKING .......................................................................................... 32 7.7 POTENTIAL IMPACTS ON PARALLEL ROADWAY CORRIDORS ............................................................................................ 32 TRAFFIC IMPACT STUDY – LASAN EAST WEST VALLEY INTERCEPTOR SEWER PROJECT PREPARED FOR CDM SMITH PAGE i List of Figures FIGURE 1 – PROJECT CORRIDOR 3 FIGURE 2 – STUDY INTERSECTION AND ROADWAY SEGMENT LOCATIONS 11 FIGURE 3 – EXISTING INTERSECTION LANE CONFIGURATION 16 FIGURE 4 – EXISTING AM/PM PEAK HOUR TURN VOLUMES 17 FIGURE 5 – INTERSECTION APPROACH LANE CONFIGURATIONS DURING CONSTRUCTION 22 FIGURE 6 – FUTURE WITHOUT PROJECT AM/PM PEAK HOUR TURN VOLUMES 25 FIGURE 7 – FUTURE WITH PROJECT CONSTRUCTION PERIOD – AM/PM PEAK HOUR TURN VOLUMES 28 List of Tables TABLE 1 – CIRCULAR 212 LEVEL OF SERVICE DEFINITIONS 7 TABLE 2 – EXISTING PROJECT CORRIDOR ROADWAY CHARACTERISTICS 12 TABLE 3 – EXISTING TRANSIT SERVICE SUMMARY 13 TABLE 4 – INTERSECTION PERFORMANCE – EXISTING CONDITIONS 15 TABLE 5 – SEGMENT PERFORMANCE – EXISTING CONDITIONS 18 TABLE 6 – PROJECT TRIP GENERATION 20 TABLE 7 – FUTURE WITHOUT-PROJECT STUDY INTERSECTION LEVEL OF SERVICE 24 TABLE 8 – FUTURE WITHOUT PROJECT STUDY ROADWAY SEGMENT LEVEL OF SERVICE 24 TABLE 9 – INTERSECTION PERFORMANCE –PROJECT CONSTRUCTION PERIOD 26 TABLE 10 – ROADWAY SEGMENT PERFORMANCE –PROJECT CONSTRUCTION PERIOD 27 Appendices APPENDIX A – TRAFFIC COUNT DATA APPENDIX B1 – LADOT CMA LEVEL OF SERVICE WORKSHEETS – EXISTING AND FUTURE CONDITIONS APPENDIX B2– LADOT CMA LEVEL OF SERVICE WORKSHEETS – FUTURE WITH-PROJECT CONDITIONS TRAFFIC IMPACT STUDY – LASAN EAST WEST VALLEY INTERCEPTOR SEWER PROJECT PREPARED FOR CDM SMITH PAGE ii 1. Introduction This report documents the traffic analysis prepared by KOA Corporation to assess the traffic impact of the proposed East West Valley Interceptor Sewer Project (proposed Project), located in the San Fernando Valley area of the City of Los Angeles. The City of Los Angeles’ Bureau of Sanitation (LASAN) is proposing to construct a new force main sewer to divert and transport wastewater from sewer basin areas in the eastern San Fernando Valley to the Donald C. Tillman Water Reclamation Plant (DCTWRP). This traffic study assesses the potential traffic impact of the construction of the proposed Project. Post-project, or operational, traffic impacts will be less than significant as the pipeline will not require active management to operate. Routine project maintenance in the operations period will not create a significant level of regularly-generated trips. 1.1 PROJECT LOCATION The proposed project centers on a six mile-long force main sewer, running underneath and parallel to Victory Boulevard in the North Hollywood – Valley Village and Van Nuys – North Sherman Oaks communities of the City of Los Angeles. The sewer project is divided into six segments based on linkages to diversion structures and pump stations, which will direct sewage from existing sewage infrastructure into the new sewer (as described in Section 1.2): Stretch 1 – Vineland to Tujunga: Approximately 2,660 feet of 24-inch pipe, located 7 feet below grade, from Vineland Avenue (adjacent to the Vineland Pump Station and Diversion Structure) to Tujunga Avenue, adjacent to the Tujunga Pump Station and Diversion Structure. Stretch 2 – Tujunga to Lankershim: Approximately 2,635 feet of 24-inch pipe, located 7 feet below grade, from Tujunga Avenue to Lankershim Boulevard, adjacent to the Lankershim Pump Station and Diversion Structure. Stretch 3 – Lankershim to Laurel Canyon: Approximately 2,631 feet of 30-inch pipe, located 7 to 11 feet below grade, from Lankershim Boulevard to Laurel Canyon Boulevard, adjacent to the Laurel Canyon Pump Station and Diversion Structure. Stretch 4 – Laurel Canyon