TRANSPORTATION IMPACT ANALYSIS ______18 Study Scope
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NVR AT BALLSTON TRAFFIC IMPACT ANALYSIS ARLINGTON COUNTY, VIRGINIA Prepared for: NVR, Incorporated Prepared by: Wells + Associates, Inc. Michael Workosky, PTP, TOPS, TSOS John Cavan, P.E., PTOE 703.917.6620 September 16, 2016 NVR AT BALLSTON TRAFFIC IMPACT ANALYSIS ARLINGTON COUNTY, VIRGINIA TABLE OF CONTENTS Page Section 1 INTRODUCTION ______________________________________________________________ 1 Section 2 BACKGROUND INFORMATION ___________________________________________________ 6 Public Road Network................................................................................................................. 6 Non-Auto Facilities and Services ............................................................................................... 6 General Land Use Plan (GLUP) ................................................................................................ 10 Site Access Concept ................................................................................................................ 10 Existing Traffic Counts ............................................................................................................. 13 Other Approved Developments .............................................................................................. 13 Section 3 TRANSPORTATION IMPACT ANALYSIS ___________________________________________ 18 Study Scope ............................................................................................................................. 18 Existing Conditions Operational Analysis................................................................................ 18 Other Development Traffic ..................................................................................................... 21 Background Development Trip Distribution Analysis ............................................................. 21 Background Traffic Growth ..................................................................................................... 21 Background Future Traffic Forecasts ...................................................................................... 21 Background Future Intersection Levels of Service ................................................................. 26 Background Future Queues .................................................................................................... 26 Site Vehicle-Trip Generation Analysis ..................................................................................... 26 Site Trip Distribution Analysis ................................................................................................. 28 Total Future Traffic Forecasts ................................................................................................. 28 Total Future Intersection Levels of Service............................................................................. 33 Total Future Queues ............................................................................................................... 33 Section 4 CONCLUSIONS ______________________________________________________________ 36 FINAL TIA 12/5/2013 1 NVR AT BALLSTON TRAFFIC IMPACT ANALYSIS ARLINGTON COUNTY, VIRGINIA LIST OF FIGURES FIGURE TITLE Page 1-1 Site Location Map ......................................................................................................... 4 1-2 Site Plan Reduction ....................................................................................................... 5 2-1 Existing Lane Use and Traffic Controls .......................................................................... 7 2-2 Transit Facilities Map .................................................................................................... 8 2-3 General Land Use Plan (GLUP) .................................................................................... 11 2-4 Existing Weekday Peak Hour Vehicular Traffic Volumes (2016) ................................ 14 2-5 Existing Weekday Peak Hour Pedestrian Volumes (2016) .......................................... 15 2-6 Existing Weekday Peak Hour Bicycle Volumes (2016) ................................................ 16 2-7 Pipeline Development Location Map.......................................................................... 17 3-1 Pipeline Development Trip Assignments (2019) ........................................................ 23 3-2 Regional Growth (2019) .............................................................................................. 24 3-3 Future Traffic Forecasts without Development (2019) .............................................. 25 3-4 Traffic Adjustments for Removed Existing Site Trips (2019) ...................................... 29 3-5 Residential Site Trip Assignments and Directional Distributions (2019) .................... 30 3-6 Net New Trips Added to Road Network (2019) .......................................................... 31 3-7 Total Future Weekday Peak Hour Traffic Forecasts with Development (2019) ......... 32 3-8 Proposed Lane Use and Traffic Controls ..................................................................... 35 LIST OF TABLES TABLE TITLE Page 3-1 Intersection Levels of Service Summary ..................................................................... 19 3-2 Intersection Queuing Summary .................................................................................. 20 3-3 Pipeline Development Trip Generation Summary ...................................................... 22 3-4 Site Trip Generation Summary.................................................................................... 26 FINAL TIA 12/5/2013 2 NVR AT BALLSTON TRAFFIC IMPACT ANALYSIS ARLINGTON COUNTY, VIRGINIA LIST OF APPENDICES APPENDIX TITLE A Existing Vehicular, Pedestrian and Bicycle Traffic Counts (2016) B Scope of Work Agreement C Existing Intersection Levels of Service and Queues (2016) D Description of Levels of Service E Background Future Intersection Levels of Service and Queues (2019) F Total Future Intersection Levels of Service and Queues (2019) FINAL TIA 12/5/2013 3 NVR at Ballston SECTION 1 INTRODUCTION This report presents the results of a Transportation Impact Analysis (TIA) for the NVR at Ballston redevelopment, in Arlington County, Virginia. As shown on Figure 1-1, the 1.26- acre subject site is located on the north and south sides of 11th Street N. and west of N. Vermont Street. The subject site is bounded by N. Vermont Street to the west, N. Utah Street to the east, and existing residential developments to the north and south. The current zoning designation for the north parcel is R15-30T (Townhouse Dwelling District) while the south parcel is zoned R-5 (One-family, Restricted Two-family District). The Arlington County General Land Use Plan (GLUP) designates both parcels as Low- Medium” density residential, with 16 to 36 units per acre. A GLUP Amendment request has been filed for the south parcel to change the designation to “High-Medium Residential Mixed-Use”. The north parcel is currently occupied by a surface parking lot. The south parcel includes a church, Full Circle Montessori School, a single-family home, and an impervious surface parking lot. The site is within ¼ mile to the Ballston-MU Metro station on the Orange and Silver Lines. In addition, the site is served by several Metro and ART bus lines and a connected network of streets, sidewalks, and bike routes. The Applicant, NVR, has filed a 4.1 Site Plan Submission to raze the existing uses and redevelop the site with 86 residential units as summarized below: North Parcel . 13 Townhouses South Parcel . 14 Townhouses . 59 Multifamily Units The proposed development would be served by 110 parking spaces (106 below grade and four (4) surface spaces). Access to the garage and loading would be provided via a private driveway south of 11th Street. The existing curb cuts on N. Vermont Street and 11 Street N. would be removed and access would be provided by two private driveways on N. Vermont Street, north and south of 11th Street N. The project site plan is included as Figure 1-2. Sidewalks would be provided along the site’s frontage on N. Vermont Street and 11th Street N. Pedestrian access to the residential lobby of the main building would be provided from N. Vermont Street. A total a 50 bicycle parking spaces will be provided on site. FINAL TIA 12/5/2013 11 Tasks undertaken in this study included the following: 1. Review the proposed site plan, development program, previous transportation studies, and other background data. 2. A field reconnaissance of existing roadway and intersection geometrics, lane use and traffic control, traffic signal phasings/timings, speed limits, pedestrian facilities, and transit services and facilities. 3. Discussions with Arlington County staff regarding the scope of this TIA. 4. Counts of existing vehicular and pedestrian traffic at four (4) study intersections and the site driveways. 5. Analysis of existing levels of service at each of the study intersections. 6. Review of existing Metrobus and ART routes and schedules. 7. Estimate the number of AM and PM peak hour vehicle-trips that would be generated by five (5) background developments based on previously approved traffic studies. 8. A forecast of background future traffic volumes without the proposed development based on existing traffic counts, an annual growth rate of 1.0 (one) percent per year (compounded annually), and traffic that would be generated by other approved but incomplete development projects (i.e., background projects),