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Glebe 672 Traffic Impact Analysis Arlington County, Virginia Table Of GLEBE 672 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 ................................................................................................................ 11 Existing Traffic Counts ............................................................................................................. 14 Other Approved Developments .............................................................................................. 16 Section 3 TRANSPORTATION IMPACT ANALYSIS ___________________________________________ 21 Study Scope ............................................................................................................................. 21 Existing Conditions Operational Analysis................................................................................ 21 Other Development Traffic ..................................................................................................... 25 Background Development Trip Distribution Analysis ............................................................. 25 Background Traffic Growth ..................................................................................................... 25 Background Future Traffic Forecasts ...................................................................................... 25 Background Future Intersection Levels of Service ................................................................. 30 Background Future Queues .................................................................................................... 30 Site Vehicle‐Trip Generation Analysis ..................................................................................... 31 Site Trip Distribution Analysis ................................................................................................. 33 Total Future Traffic Forecasts ................................................................................................. 33 Total Future Intersection Levels of Service ............................................................................. 36 Total Future Queues ............................................................................................................... 36 Section 4 CONCLUSIONS ______________________________________________________________ 37 FINAL TIA 12/5/20131 GLEBE 672 TRAFFIC IMPACT ANALYSIS ARLINGTON COUNTY, VIRGINIA LIST OF FIGURES FIGURE TITLE Page 1‐1 Site Location Map ......................................................................................................... 2 1‐2 Site Plan Reduction ....................................................................................................... 3 2‐1 Existing Lane Use and Traffic Controls .......................................................................... 8 2‐2 Transit Facilities Map .................................................................................................... 9 2‐3 General Land Use Plan (GLUP) .................................................................................... 12 2‐4 Existing Weekday Peak Hour Vehicular Traffic Volumes (2014) ................................ 17 2‐5 Existing Weekday Peak Hour Pedestrian Volumes (2014) .......................................... 18 2‐6 Existing Weekday Peak Hour Bicycle Volumes (2014) ................................................ 19 2‐7 Pipeline Development Location Map ......................................................................... 20 3‐1 Pipeline Development Trip Assignments (2017) ........................................................ 27 3‐2 Regional Growth (2017) .............................................................................................. 28 3‐3 Future Traffic Forecasts without Development (2017) .............................................. 29 3‐4 Net New Site Trip Assignments and Directional Distributions (2017) ........................ 34 3‐5 Total Future Weekday Peak Hour Traffic Forecasts with Development (2017) ......... 35 LIST OF TABLES TABLE TITLE Page 3‐1 Intersection Levels of Service Summary ..................................................................... 23 3‐2 Intersection Queuing Summary .................................................................................. 24 3‐3 Background Development Vehicle‐Trip Generation Summary .................................. 26 3‐4 Site Trip Generation Summary ................................................................................... 32 FINAL TIA 12/5/20132 GLEBE 672 TRAFFIC IMPACT ANALYSIS ARLINGTON COUNTY, VIRGINIA LIST OF APPENDICES APPENDIX TITLE A Existing Vehicular, Pedestrian, Bicycle Traffic and Saturated Flow Rate Counts (2014) B Scope of Work Agreement C Existing Intersection Levels of Service and Queues (2014) D Description of Levels of Service E Background Future Intersection Levels of Service and Queues (2017) F Total Future Intersection Levels of Service and Queues (2017) FINAL TIA 12/5/20133 Glebe 672 SECTION 1 INTRODUCTION This report presents the results of a Transportation Impact Analysis (TIA) for the Glebe 672 redevelopment, in Arlington County, Virginia. As shown on Figure 1‐1, the 1.01‐acre subject site is located at 670 North Glebe Road, in the southwest quadrant of the North Glebe Road/7th Street North intersection and in the northwest quadrant of the North Glebe Road/North Carlin Springs Road intersection. The subject site is bounded by 7th Street North to the north, North Glebe Road to the east, a public alley to the west, and North Carlin Springs Road to the south. The current zoning designation for the site is C‐2 (Service Commercial‐Community Business District) and designated as High‐Medium Residential Mixed‐Use use on the Arlington County General Land Use Plan (GLUP). The site is presently developed with an existing gas station with convenience store, a car dealership, and a parking lot. The site is approximately ¼ mile to the Ballston‐MU Metro station on the Orange Line and Silver Line. In addition, the site is served by several Metro and ART bus lines and a connected network of street, sidewalk and bike routes. The Applicant, The Penrose Group, plans to rezone the property to R‐C (Apartment Dwelling and Commercial District); raze the gas station, car dealership, and parking lot; and then redevelop the site with the following approximate development program: . 178 Residential Dwelling Units . 4,510 GSF Retail The proposed uses would be developed in a building with 178 below‐grade parking spaces. Access to the garage and loading would be provided via 7th Street North. The project site plan, dated July 15, 2014, is included as Figure 1‐2. Sidewalks would be provided along the site’s frontage on North Glebe Road, 7th Street North, and North Carlin Springs Road. Pedestrian access to the residential lobby of the building would be provided from North Glebe Road. Pedestrian access to the retail uses would also be provided from entrances on North Glebe Road. FINAL TIA 12/5/20131 1 2 3 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 six (6) study intersections and the site driveway(s). 5. Analysis of existing levels of service at each of these intersections. 6. Review of existing Metrobus and ART routes and schedules. 7. The numbers of AM and PM peak hour vehicle‐trips that would be generated by four (4) background developments were estimated based on previously approved traffic studies. 8. Background future traffic volumes were forecasted based on existing traffic counts, an annual growth rate of 1 (one) percent per year (compounded) on through and turning movements, and traffic that would be generated by other approved but incomplete development projects (i.e., background projects), for build‐out year 2017 conditions. 9. Background future levels of service were calculated at each key intersection based on background future traffic forecasts and existing traffic controls and intersection geometrics. 10. The numbers of AM and PM peak hour vehicle‐trips that would be generated by the Glebe 672 redevelopment were estimated based on Institute of Transportation Engineers (ITE) trip generation rates/equations (9th Edition), estimates of transit use/non‐auto mode splits by residents, patrons and employees, and local knowledge. 11. Review of the Glebe 672 parking and loading requirements. 12. Total future traffic volumes were forecasted based on background future traffic forecasts, minus trips generated by the existing uses on‐site, plus site traffic assignments from the proposed development. 13.
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