FBI Headquarters Consolidation Appendix C: Draft Transportation Impact Assessment: Greenbelt Appendix C Federal Bureau of Investigation Headquarters Consolidation Draft Transportation Impact Assessment Greenbelt 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 Existing Land Use ................................................................................................................. 2-4 Planning Context .................................................................................................................. 2-6 Federal Elements of the Comprehensive Plan for the National Capital .............................. 2-6 Plan Prince George’s 2035 ................................................................................................... 2-7 Greenbelt Sector Plan and Sectional Map Amendment ...................................................... 2-8 City of Greenbelt Pedestrian and Bicyclist Master Plan ...................................................... 2-9 2.5 Regulatory Requirement and Transportation Assumption Agreement ................................... 2-10 National Capital Planning Commission Requirements ...................................................... 2-10 Jurisdictional Agreement ................................................................................................... 2-10 EXISTING CONDITION: GREENBELT STUDY AREA ............................................................................... 3-1 3.1 Introduction ............................................................................................................................ 3-1 Study Area Description ........................................................................................................ 3-1 Project Area Accessibility and Roadway Functional Classification ...................................... 3-2 Roadway Descriptions .......................................................................................................... 3-4 Data Collection ..................................................................................................................... 3-9 3.2 Pedestrian Network ............................................................................................................... 3-15 Overall Sidewalk Observations .......................................................................................... 3-15 Accessibility Compliance .................................................................................................... 3-16 3.3 Bicycle Network .................................................................................................................... 3-17 3.4 Public Transit ......................................................................................................................... 3-20 Metrorail ............................................................................................................................ 3-20 Commuter Rail ................................................................................................................... 3-30 Bus: Local ........................................................................................................................... 3-30 Bus: Intercity ...................................................................................................................... 3-45 Bus: Commuter .................................................................................................................. 3-45 Shuttles .............................................................................................................................. 3-45 Ridesharing (Slugging) ........................................................................................................ 3-45 Carsharing .......................................................................................................................... 3-45 3.5 Parking .................................................................................................................................. 3-45 3.6 Truck Access .......................................................................................................................... 3-48 3.7 Traffic Analysis ...................................................................................................................... 3-48 Analysis Tools ..................................................................................................................... 3-48 Intersection Operations Analysis Method ......................................................................... 3-49 FBI Headquarters Consolidation U.S. General Services Administration i Transportation Impact Assessment Greenbelt Intersection Queuing Analysis Method.............................................................................. 3-54 Existing Condition Intersection Operations Analysis ......................................................... 3-55 Existing Condition Intersection Queue Analysis ................................................................ 3-66 Freeway Volumes Results .................................................................................................. 3-70 3.8 Crash Analysis ....................................................................................................................... 3-70 ANALYSIS OF NO-BUILD CONDITION ................................................................................................. 4-1 4.1 No-action Alternative (All Other EIS Resource Areas) ............................................................... 4-2 4.2 No-build Condition Improvements .......................................................................................... 4-4 Planned Developments ........................................................................................................ 4-4 Planned Roadway Improvements: ....................................................................................... 4-6 4.3 Pedestrian Network ............................................................................................................... 4-13 4.4 Bicycle Network .................................................................................................................... 4-13 4.5 Public Transit ......................................................................................................................... 4-16 Projected Transit Growth ................................................................................................... 4-16 Metrorail Analysis .............................................................................................................. 4-16 Metrobus Analysis .............................................................................................................. 4-19 Greenbelt Metro Station Bus Bays ..................................................................................... 4-21 Level of Impact ................................................................................................................... 4-21 4.6 Parking .................................................................................................................................. 4-22 4.7 Truck Access .......................................................................................................................... 4-23 4.8 Traffic Analysis ...................................................................................................................... 4-24 Background Growth ........................................................................................................... 4-24 Development of Existing Vehicle Volumes through Proposed North and South Core Roadway Network .............................................................................................................. 4-25 Trip Generation/Modal Split .............................................................................................. 4-35 Trip Distribution ................................................................................................................. 4-39 Development of No-build Condition .................................................................................. 4-45 No-build Condition Operations Analysis ............................................................................ 4-51 No-Build Condition Queuing Analysis ................................................................................ 4-67 No-build Condition Freeway Volumes ............................................................................... 4-73 ANALYSIS OF BUILD CONDITION ....................................................................................................... 5-1