SIDWELL FRIENDS SCHOOL TRANSPORTATION STATEMENT December 2019 Board of Zoning Adjustment District of Columbia CASE NO.17703C EXHIBIT NO.25A1 Sidwell Friends School Transportation Statement Washington, DC December 2019 Prepared by: Wells + Associates (703) 917‐6620 www.WellsAndAssociates.com @WellsAssoc @WellsandAssociates Wells + Associates Sidwell Friends School Transportation Statement December 2019 TABLE OF CONTENTS PAGE INTRODUCTION ____________________________________________________________ 1 OVERVIEW ................................................................................................................................. 1 Table 1: Summary of Relevant Characteristics ...................................................... 3 STUDY SCOPE ............................................................................................................................ 4 EXISTING TRANSPORTATION FACILITIES _____________________________________ 5 ROADWAY NETWORK ............................................................................................................... 5 Table 2: Roadway Segment Details ........................................................................ 5 MULTI‐MODAL TRANSPORTATION FACILITIES ......................................................................... 5 Public Transportation Facilities and Services ...................................................................... 5 Existing Pedestrian Facilities ............................................................................................... 6 Existing Bicycle Facilities ..................................................................................................... 6 Capital Bikeshare................................................................................................................. 7 EXISTING CONDITIONS ANALYSIS ____________________________________________ 7 TRAFFIC VOLUMES .................................................................................................................... 7 OPERATIONAL ANALYSIS ........................................................................................................... 8 Capacity Analysis ................................................................................................................. 8 Table 3: Level of Service Summary ......................................................................... 8 Queue Analysis .................................................................................................................. 10 Table 4: Synchro 95th Percentile Queue Summary (in feet) ................................. 11 FUTURE BACKGROUND CONDITIONS _______________________________________ 13 TRAFFIC VOLUMES ................................................................................................................. 13 Overview .......................................................................................................................... 13 Regional Growth .............................................................................................................. 13 Pipeline Developments .................................................................................................... 13 City Ridge (3900 Wisconsin Avenue) ......................................................................... 13 4000 Wisconsin Avenue .............................................................................................. 14 Hearst Recreation Center Expansion .......................................................................... 14 Georgetown Day School ............................................................................................. 14 Background Forecasts ....................................................................................................... 14 OPERATIONAL ANALYSIS ......................................................................................................... 14 Capacity Analysis ............................................................................................................... 14 Queue Analysis .................................................................................................................. 15 SITE ANALYSIS _____________________________________________________________ 15 OVERVIEW ............................................................................................................................... 15 SITE ACCESS ............................................................................................................................. 16 Overview ........................................................................................................................... 16 Pick‐up/Drop‐off Operations ............................................................................................ 16 Upper School PUDO .................................................................................................... 17 Upper + Middle School PUDO ..................................................................................... 17 New Loop .................................................................................................................... 18 Loading Access .................................................................................................................. 18 i Sidwell Friends School Transportation Statement December 2019 TABLE OF CONTENTS (CONTINUED) PROPOSESD PARKING ............................................................................................................. 18 Vehicular Parking .............................................................................................................. 18 Table 5: Parking Summary ................................................................................... 19 Bicycle Parking .................................................................................................................. 19 Table 6: Proposed Bicycle Parking Summary ....................................................... 19 TRIP GENERATION ANALYSIS .................................................................................................. 19 Existing Vehicular Trip Generation ................................................................................... 19 Table 7: Existing Site Trip Generation Summary .................................................. 20 Mode Split Survey ............................................................................................................. 20 Table 8: Summary of Mode Split Survey .............................................................. 20 Proposed Vehicular Trip Generation ................................................................................ 21 Table 9: New Site Trip Generation Summary – Without TDM Plan ..................... 21 Table 10: Trip Generation Goals – With TDM Plan .............................................. 22 Table 11: Trip Generation – Upton Site Only ....................................................... 23 SITE TRIP DISTRIBUTION AND ASSIGNMENT .......................................................................... 23 Table 12: Site Trip Distributions ........................................................................... 23 TRANSPORTATION MANAGEMENT PLAN ___________________________________ 24 TRANSPORTATION DEMAND MANAGEMENT ........................................................................ 24 Overview ........................................................................................................................... 24 Components of TDM Plan ................................................................................................. 24 General ........................................................................................................................ 24 Students ...................................................................................................................... 25 Faculty/Staff ................................................................................................................ 26 OPERATIONS MANAGEMENT PLAN ........................................................................................ 27 LOADING MANAGEMENT PLAN .............................................................................................. 28 MONITORING PLAN ................................................................................................................ 29 TOTAL FUTURE CONDITIONS _______________________________________________ 32 TRAFFIC FORECASTS ................................................................................................................ 32 OPERATIONAL ANALYSIS ......................................................................................................... 32 Capacity Analysis ............................................................................................................... 32 Table 13: Level of Service Summary ..................................................................... 33 Queue Analysis ................................................................................................................. 35 Table 14: Synchro 95th Percentile Queue Summary (in feet) ............................... 35 IMPROVEMENT ANALYSIS ....................................................................................................... 38 CONCLUSION AND RECOMMENDATIONS ___________________________________ 39 ii Sidwell Friends School Transportation Statement December 2019 LIST OF FIGURES FIGURE TITLE 1 Site Location Map 2 Proposed Site