FBI Headquarters Consolidation Appendix D: Draft Transportation Impact Assessment: Landover Appendix D Federal Bureau of Investigation Headquarters Consolidation Draft Transportation Impact Assessment Landover Site Alternative Prepared by for October 2015 Table of Contents INTRODUCTION ................................................................................................................................ 1-1 BACKGROUND .................................................................................................................................. 2-1 2.1 Proposed Action ...................................................................................................................... 2-1 2.2 Purpose and Need ................................................................................................................... 2-1 2.3 NEPA Requirements ................................................................................................................ 2-1 2.4 Local Land Use Plans ................................................................................................................ 2-4 2.5 Regulatory Requirement and Transportation Assumption Agreement ................................... 2-11 EXISTING CONDITION: LANDOVER STUDY AREA ................................................................................ 3-1 3.1 Introduction ............................................................................................................................ 3-1 3.2 Pedestrian Network ............................................................................................................... 3-15 3.3 Bicycle Network ..................................................................................................................... 3-17 3.4 Public Transit ......................................................................................................................... 3-19 3.5 Parking .................................................................................................................................. 3-39 3.6 Truck Access .......................................................................................................................... 3-42 3.7 Traffic Analysis ...................................................................................................................... 3-42 FBI Headquarters Consolidation U.S. General Services Administration i Transportation Impact Assessment Landover 3.8 Crash Analysis ....................................................................................................................... 3-75 ANALYSIS OF NO-BUILD CONDITION ................................................................................................. 4-1 4.1 No-build Condition Improvements ........................................................................................... 4-1 4.2 Pedestrian Network ................................................................................................................. 4-5 4.3 Bicycle Network ....................................................................................................................... 4-5 4.4 Public Transit ........................................................................................................................... 4-8 4.5 Parking .................................................................................................................................. 4-13 4.6 Truck Access .......................................................................................................................... 4-13 4.7 Traffic Analysis ...................................................................................................................... 4-13 ANALYSIS OF BUILD CONDITION ....................................................................................................... 5-1 5.1 Description of Build Condition ................................................................................................. 5-1 5.2 Trip Generation and Modal Split .............................................................................................. 5-5 5.3 Pedestrian Network ............................................................................................................... 5-10 5.4 Bicycle Network ..................................................................................................................... 5-10 5.5 Public Transit ......................................................................................................................... 5-11 5.6 Parking .................................................................................................................................. 5-19 5.7 Truck Access .......................................................................................................................... 5-22 5.8 Traffic Analysis ...................................................................................................................... 5-22 FBI Headquarters Consolidation U.S. General Services Administration ii Transportation Impact Assessment Landover 5.1 Transportation Demand Management ................................................................................... 5-71 MITIGATION MEASURES ................................................................................................................... 6-1 6.1 Pedestrian Network ................................................................................................................. 6-1 6.2 Bicycles.................................................................................................................................... 6-1 6.3 Public Transit ........................................................................................................................... 6-3 6.4 Parking .................................................................................................................................... 6-3 6.5 Truck Access ............................................................................................................................ 6-3 6.6 Traffic Analysis ........................................................................................................................ 6-4 6.7 Overall Summary ................................................................................................................... 6-68 REFERENCES ..................................................................................................................................... 7-1 ACRONYMS AND ABBREVIATIONS .................................................................................................... 8-1 List of Appendices Appendix D1 – Landover Site Transportation Agreement Appendix D2 – Traffic Counts Appendix D3 – Metro Station Capacity Analysis Appendix D4 – Metro Station Evacuation Analysis Appendix D5 – SimTraffic™ Sample Size Determination Statistics Appendix D6 – Metrobus Capacity Analysis Appendix D7 – NCHRP 684 Worksheets Appendix D8 – Background Distributions Appendix D9 – Shuttle Bus Service Plan Appendix D10 – Shuttle Bus Analysis in Synchro™/SimTraffic™ Appendix D11 – TransModeler™ Calibration Appendix D12 – TransModeler™ Sample Size Determination Statistics FBI Headquarters Consolidation U.S. General Services Administration iii Transportation Impact Assessment Landover List of Tables Table 2-1: Landover Site Conditions Corresponding to Each Alternative ........................................................ 2-3 Table 2-2: Traffic and Transit Impact Thresholds ............................................................................................. 2-4 Table 3-1: Bicycle Facilities in Site Study Area ................................................................................................ 3-18 Table 3-2: Metrorail Frequency of Service at Largo Town Metro Center Station .......................................... 3-21 Table 3-3: Mode of Access to Largo Town Center Metro Station in 2012 ..................................................... 3-21 Table 3-4: Automobile and Bicycle Parking Details at Largo Town Center Metro Station ............................. 3-22 Table 3-5: Largo Town Center Metro Station Vertical and Fare Infrastructure ............................................. 3-23 Table 3-6: Station Bus Loop Bus Bay Assignments and Capacity at Largo Town Center Metro Station ........ 3-24 Table 3-7: Average Weekday Entries and Exits by Hour at Largo Town Center Metro Station ..................... 3-25 Table 3-8 Largo Town Center Metro Station Weekday Peak Hour and Peak 15-Minute Ridership.............. 3-26 Table 3-9: Top Ten Destinations for Passengers Entering at Largo Town Center Metro Station ................... 3-27 Table 3-10: Largo Town Center Metro Station Volume-to-Capacity Analysis Summary .................................. 3-28 Table 3-11: Major Service Characteristics of Bus Routes Serving the Study Area ........................................... 3-30 Table 3-12: Frequency of Service on Bus Routes Serving the Study Area ........................................................ 3-33 Table 3-13: Average Weekday Ridership by Bus Route Serving the Study Area .............................................. 3-35 Table 3-14: Metrobus Ridership by Route, Direction, and Time Period in the Study Area .............................. 3-35 Table 3-15: Study Area Metrobus Maximum Passenger Loads by Route, Direction, and Time Period ........... 3-36 Table 3-16: Study Area Total Number of Overcrowded Trips