United Therapeutics Phase 3 Silver Spring, MD

Transcription

1 Traffic Impact Study United Therapeutics Phase 3 Silver Spring, MD Prepared for: United Therapeutics Corporation April 1, 2013 Kimley-Horn & Associates, Inc. 2013

2 This document, together with the concepts and designs presented herein, as an instrument of service, is intended only for the specific purpose and client for which it was prepared. Reuse of and improper reliance on this document without written authorization and adaptation by Kimley-Horn and Associates, Inc. shall be without liability to Kimley-Horn and Associates, Inc.

3 TABLE OF CONTENTS Contents TABLE OF CONTENTS...i LIST OF FIGURES...ii LIST OF TABLES...ii INTRODUCTION... 1 AREA TRANSPORTATION SYSTEM... 3 Existing Area Roadways... 3 Existing Area Transit Service... 6 Metrorail Red Line... 6 Metrobus... 6 MTA Commuter Route... 7 VanGo Downtown Shuttle... 7 Ride-On MARC Train Service Existing Pedestrian and Bicycles Facilities Future Roadway Modifications DESCRIPTION OF PROPOSED DEVELOENT TRAFFIC VOLUMES Existing Traffic Volumes Vehicle Trip Generation and Directions of Approach Background Traffic Volumes Site Generated Traffic Volumes Total Future Traffic Volumes ASSESSMENT OF TRAFFIC CONDITIONS Intersection Capacity Analyses Pedestrian Impact Transportation Policy Area Review (TPAR) CONCLUSIONS APPENDIX Scoping Letter Site Plan (TBD) Traffic and Pedestrian Count Summaries Background Development Trip Generation Figures CLV Worksheets i

4 LIST OF FIGURES Figure 1 - Site Vicinity Map... 2 Figure 2 Study Area... 5 Figure 3 Existing Metrobus Routes... 8 Figure 4 Existing MTA Commuter Bus Routes... 9 Figure 5: VanGo Bus Routes Figure 6 Ride-On Bus Routes Figure 7 Existing Pedestrian and Bicycle Facilities Figure 8 - Existing Lane Designations Figure 9 Existing Peak hour Traffic Volumes Figure 10 Existing Peak Hour Pedestrian and Bicycle Volumes Figure 11 Directional Distribution of Traffic Figure 12 Approved and Unbuilt Developments Figure 13 Approved and Unbuilt Development Peak Hour Traffic Volumes Figure 14 Background Peak Hour Traffic Volumes Figure 15 - Site Generated Peak Hour Traffic Volumes Figure 16 - Total Future Peak Hour Traffic Volumes LIST OF TABLES Table 1: Pedestrian Crossing Distance Analysis Results Table 2: Silver Spring CBD Trip Generation Rates Table 3: Distribution of Site Generated Traffic Table 4: Trip Generation for Approved and Unbuilt Developments Table 5: Site Generated Traffic Volumes Table 6: Intersection Capacity Analysis Results ii

5 INTRODUCTION This report presents the results of a traffic impact study for the proposed Phase 3 of the United Therapeutics Silver Spring Campus. The site vicinity map is shown in Figure 1. The site is located in the southwest corner of the Colesville Road (US 29) and Spring Street intersection. The site currently contains the Montgomery County Garage 21, with current vehicular access located along Spring Street. Previously, vehicle access to Garage 21 had also been provided along Cameron Street. The proposed development includes removing and replacing the existing parking structure with up to approximately 115,000 square feet of office/laboratory and approximately 10,000 square feet of retail. The project will provide one-half of the parking typically required under the Zoning Ordinance. This traffic study was prepared to satisfy the requirements of the Adequate Public Facilities Ordinance (APFO) associated with the Preliminary Plan of Subdivision application for this project. The study was prepared in accordance with the Local Area Transportation Review (LATR) and Transportation Policy Area Review (TPAR) guidelines established by the Montgomery County Planning Board (MCPB), dated February The following sections of this report describe the area transportation system, existing traffic volumes, the calculation of traffic generated by approved and unbuilt developments, and the impact of the proposed development. 1

6 SITE NOT TO SCALE Site Vicinity Map Permitted Use Number Figure 1 United Therapeutics Phase 3, Silver Spring, Maryland Page 2

7 AREA TRANSPORTATION SYSTEM Existing Area Roadways The Silver Spring CBD functions both as a through commuter route for drivers commuting between residential areas in Montgomery County and work locations in the District of Columbia, and as an employment center in its own right. Included in this study are two of the major roadways that traverse the study area: Georgia Avenue (US Route 29/MD Route 97) and Colesville Road (US Route 29/MD Route 384). Also included are additional roadways that provide vehicular access to the project site. A brief description of the area roadway system follows. Georgia Avenue This major northwest-southeast arterial connects the Capital Beltway and Washington, DC, and is designated as US Route 29 and MD Route 97 in the vicinity of the study area. Through this area of Silver Spring, Georgia Avenue is a six-lane divided arterial. The study intersection of Georgia Avenue with Colesville Road is signalized. Colesville Road This major northeast-southwest arterial connects 16 th Street to the southwest with University Boulevard to the northeast, where it becomes Columbia Pike. In this study, Colesville Road is assumed to be oriented north-south. Colesville Road is designated as MD Route 384 south of Georgia Avenue and as US Route 29 north of Georgia Avenue. Colesville Road is a major commuter route that has an interchange with the Capital Beltway (I-495) and connects the northern communities along the Route 29 corridor with Silver Spring and downtown Washington, D.C. via 16 th Street. In the study area, Colesville Road has a six-lane cross-section with the inside through lane in each direction serving as a reversible lane during the morning and afternoon commuter hours. The study intersections of Colesville Road with Georgia Avenue, Fenton Street, and Spring Street are signalized. Spring Street This roadway serves as a collector road through the Silver Spring area, connecting 16 th Street with areas to the east of Colesville Road. In the study area, Spring Street has a four-lane cross-section that consists of four travel lanes east of Cameron Street and two travel lanes and two parking lanes west of Cameron Street. Spring Street transitions to a two-lane roadway to the east of Colesville Road. Further to the east of Colesville Road, Spring Street changes name designation to Cedar Street and continues to its intersection with Wayne Avenue. 3

8 The study intersections of Spring Street with the Cameron Street, Colesville Road, and Ellsworth Drive are all signalized. The proposed site driveway will be located along Spring Street west of the intersection of Spring Street and Colesville Road. Cameron Street This north-south roadway serves as a collector in the Silver Spring area, providing access for local development to Georgia Avenue and Spring Street. In the study area, Cameron Street has two travel lanes and two parking lanes. The study intersection of Cameron Street with Spring Street is signalized. Fenton Street This local east-west roadway extends from Cameron street east to Takoma Avenue in the City of Takoma Park. East of Takoma Avenue, Fenton Street becomes Albany Avenue. Fenton Street runs parallel to Georgia Avenue in the study area. The study intersection of Fenton Street and Colesville Road is signalized. Ellsworth Drive This local north-south roadway connects the residential areas to the north with the Silver Spring CBD. Ellsworth Drive terminates at Bennington Drive to the north and Georgia Avenue to the south. Ellsworth Drive has two travel lanes and two parking lanes in the study area. The study intersection of Ellsworth Drive and Spring Street/Cedar Street is signalized. The study area is shown in Figure 2. 4

9 NOT TO SCALE 1 2 SITE Legend: Study Intersection - Project Location Study Area United Therapeutics Phase 3, Silver Spring, Maryland Figure 2 Page 5

10 Existing Area Transit Service Existing transit service in the study area includes the nearby Silver Spring Metrorail station, the Silver Spring Transit Center (currently under construction), MARC commuter rail station, numerous bus routes, and a bus terminal at the Metrorail station. Metrorail Red Line The Silver Spring Metrorail Station is located along Colesville Road between Wayne Avenue/2 nd Avenue and East-West Highway. The entrances for the station are located at the east side and west side of Colesville Road. The station is on the Metrorail s Red Line which runs between Glenmont and Shady Grove with a loop through downtown Washington DC. Service is provided on weekdays, Saturdays, and Sundays. On weekdays, trains operate between 5:09 and 12:24. On Saturdays and Sundays, the first train leaves at 7:09. On Friday and Saturday nights, the last train leaves at 3:24 the next day. Metrobus The following Metrobus Routes are available in the study area: Metrobus routes F4 and F6, the New Carrollton-Silver Spring lines, travel between the Silver Spring Metrorail Station, through Prince Georges County, and the New Carrolton Metrorail Station. In the study area, routes F4 and F6 run along Fenton Street. Metrobus route J4, the College Park-Bethesda line, travels between the Montgomery Mall transit center, Medical Center Metrorail Station, Bethesda Metrorail Station, and College Park-University of Maryland Metrorail Station. Metrobus route J5, the Twinbrook-Silver Spring line, travels between the Twinbrook Metrorail Station, the Grosvenor-Strathmore Metrorail station, and the Silver Spring Metrorail Station. In the study area, route J5 runs primarily along Georgia Avenue. Metrobus route Q2, the Veirs Mill Road line, travels between Shady Grove, Rockville, Wheaton, Forest Glen, and Silver Spring Metrorail stations. In the study area, it runs primarily along Georgia Avenue. Metrobus routes Y5, Y7, Y8, Y9, the Georgia Avenue-Maryland lines, travel between Montgomery General Hospital in Olney, the Norbeck park-and-ride lots, and the Glenmont, Wheaton, Forest Glen, and Silver Spring Metrorail Stations. In the study area, these routes run primarily along Georgia Avenue. Metrobus routes Z2 and Z6, the Colevsille-Ashton and Calverton-Westfarm lines, respectively, travel primarily along Colesville Road in the study area. Route Z2 travels between Olney, Ashton, Cloverly, Colesville, Four Corners, and the Silver Spring 6

11 Metrorail Station. Route Z6 travels between the Burtonsville Crossing and Briggs Chaney park-and-ride lots, Calverton, Westfarm, White Oak, Four Corners, and the Silver Spring Metrorail Station. Metrobus route Z8, the Fairland line, travels between the Greencastle and Briggs Chaney park-and-ride lots, Fairland, White Oak, Four Corners, and the Silver Spring Metrorail Station. In the study area, route Z8 travels along Colesville Road. Metrobus routes Z9 and Z29, the Laurel-Burtonsville express lines, travel between the South Laurel and Burtonsville park-and-ride lots, Fairland, White Oak, and the Silver Spring Metrorail Station. In the study area, routes Z9 and Z29 travel along Colesville Road. Metrobus routes Z11 and Z13, the Greencastle-Briggs Chaney Express lines, travel between Greencastle and Briggs Chaney park-and-ride lots and the Silver Spring Metrorail station. In the study area, routes Z11 and Z13 travel along Colesville Road. The Metrobus routes in the study are shown on Figure 3. MTA Commuter Route The Maryland Transit Administration (MTA) provides commuter bus service. Route 915, Columbia/Silver Spring/Washington D.C., and Route 929, Columbia to Silver Spring/Washington D.C. express service, travel from Columbia, Maryland, to downtown Washington D.C stopping at the Scaggsville and Burtonsville park-and-ride lots and the Silver Spring Metrorail Station. In the study area, these routes travel along Colesville Road. The service is provided on weekdays. The MTA Commuter Routes in the study are shown on Figure 4. VanGo Downtown Shuttle The VanGo bus service is a free shuttle service in Downtown Silver Spring that operates Monday through Friday from 7:00 a.m. to 7:00 p.m. The shuttle arrives every eight minutes and stops at 25 locations within Silver Spring. Stops within the study area are located on Cameron Street, Fenton Street, Colesville Road, and Georgia Avenue. The VanGo stops and routes in the study area are shown on Figure 5. 7

12 NOT TO SCALE SITE Legend: - Project Location A1 - Bus Route Existing Metrobus Routes United Therapeutics Phase 3, Silver Spring, Maryland Figure 3 Page 8

13 NOT TO SCALE SITE Legend: - Project Location 1 - Bus Route Existing MTA Commuter Bus Routes Figure 4 United Therapeutics Phase 3, Silver Spring, Maryland Page 9

14 NOT TO SCALE SITE Legend: - Project Location - Bus Stops VanGo Bus Routes Figure 5 United Therapeutics Phase 3, Silver Spring, Maryland Page 10

15 Ride-On Montgomery County provides Ride-On local bus service. The following Ride-One routes are available in the study area: Route 4: Kensington to Silver Spring Metrorail Station via Second Avenue. Route 5: Twinbrook Metrorail Station to Kensington to Silver Spring Metrorail Station via Second Avenue and 16 th Street Route 8: Wheaton Metrorail Station to Forest Glen Metrorail Station to Silver Spring Metrorail Station via Colesville Road Route 9: Wheaton Metrorail Station to Silver Spring Metrorail Station via Colesville Road Route 12: Takoma Metrorail Station to Silver Spring Metrorail Station via Georgia Avenue, Wayne Avenue, Cedar Street, and Colesville Road Route 13: Takoma Metrorail Station to Silver Spring Metrorail Station via Colesville Road and Georgia Avenue Route 14: Takoma Metrorail Station to Silver Spring Metrorail Station via Colesville Road and Georgia Avenue Route 15: Langley Park to Silver Spring Metrorail Station via Wayne Avenue Route 16: Langley Park/Takoma Park to Silver Spring Metrorail Station via Fenton Street, Colesville Road, and Georgia Avenue Route 17: Langley Park to Silver Spring Metrorail Station via Fenton Street, Colesville Road, and Georgia Avenue Route 18: Langley Park to Silver Spring Metrorail Station via Spring Street, Colesville Road, and 1 st Avenue Route 19: Northwood to Silver Spring Metrorail Station via Wayne Avenue Route 20: Hillandale to Silver Spring Metrorail Station via Fenton Street Route 21: Briggs-Chaney park-and-ride lot to Silver Spring Metro Rail Station via Colesville Road Route 22: Hillandale to Silver Spring Metrorail Station via Colesville Road Route 28: Georgia Avenue MARC Station to Silver Spring MARC Station via Georgia Avenue The Ride-On routes in the study area are shown in Figure 6. 11

16 NOT TO SCALE SITE Legend: - Project Location 1 - Bus routes Existing Ride-On Bus Routes Figure 6 United Therapeutics Phase 3, Silver Spring, Maryland Page 12

17 MARC Train Service The MTA also provides MARC Train service. The Brunswick line serves Union Station in Washington D.C.; Silver Spring, Kensington, Garrett Park, Rockville, Washington Grove, Gaithersburg, Metropolitan Grove, Germantown, Boyds, Barnesville, Dickerson, Point of Rocks, Brunswick, MD; Harpers Ferry, Duffields & Martinsburg, W.V., with extension service to Monocacy and Frederick, MD. The Brunswick line runs on weekdays. Existing Pedestrian and Bicycles Facilities This pedestrian analysis examines the presence of pedestrian and bicycle facilities along the area streets and the pedestrian and bicycle accommodations at each study intersection. A review of existing conditions confirms that in the study area sidewalks are present along both sides of Colesville Road, Spring Street, Cameron Street, Fenton Street, and Georgia Avenue. Review of existing conditions confirms that crosswalks and pedestrian signal heads are provided wherever pedestrian crossings are permitted at signalized study intersections. Pedestrians are not permitted to cross the north leg of the intersection of Colesville Road and Spring Street because of the potential conflict with the double and sometimes triple eastbound left turn lanes from Spring Street to Colesville Road. Audible pedestrian tones, that indicate to pedestrians that it is safe to cross, are provided at all of the study intersections. The audible pedestrian tones are actuated by pedestrian pushbuttons located near each pedestrian crossing. ADA compliant ramps are provided at all study intersections where pedestrian crossings are permitted. A pedestrian crossing distance analysis was performed at the study intersections to determine the existing crossing conditions and signal timing necessary to meet the required pedestrian and bicycle crossing needs. Field measurements were taken to determine the pedestrian crossing distances, measured curb-to-curb, at each intersection. Using these measurements, the required pedestrian crossing time was calculated by dividing the distance by an average walking speed of 3.5 feet per second. Table 1 summarizes the results of the pedestrian crossing distance analysis. The crossing times provided at each intersection are sufficient for pedestrian movements. If there were locations where pedestrian crossing time criteria were deemed insufficient, the applicant would be required to inform Montgomery County DOT and request that it revise the signal timing in accordance with the LATR and TPAR Guidelines. This is not the case at any of these study intersections. 13

18 Pedestrian Crossing Table 1: Pedestrian Crossing Distance Analysis Results Required Crossing Crossing Distance Time (feet) (seconds) Provided Crossing Time* Peak Hour (seconds) Provided Crossing Time* Peak Hour (seconds) Spring Street and Cameron Street Cameron Street North Leg Cameron Street South Leg Spring Street East Leg Spring Street West Leg Spring Street and Colesville Road Spring Street North Leg Spring Street South Leg Colesville Road East Leg Colesville Road West Leg Spring Street and Ellsworth Drive Ellsworth Drive North Leg Ellsworth Drive South Leg Cedar Street East Leg Spring Street West Leg Colesville Road and Fenton Street Colesville Road North Leg Colesville Road South Leg Fenton Street East Leg Fenton Street West Leg Colesville Road and Georgia Avenue Colesville Road North Leg Colesville Road South Leg Georgia Avenue East Leg Georgia Avenue West Leg *Estimated as the sum of walk time and flashing don t walk time as noted during field observations. Separate, designated bicycle lanes are not provided along any of the study network roadways, including Colesville Road, Spring Street, Cameron Street, Fenton Street, and Georgia Avenue. However, there is signage provided in the southbound direction on Colesville Road indicating that bikes are permitted to use the full travel lane when they are present. Pedestrian and bicycle accommodations are shown in Figure 6. Future Roadway Modifications There are no programmed roadway improvements in the study area that were considered in this study. 14

19 NOT TO SCALE SITE C Legend: - Study Intersection (All Signalized) Pedestrian Crossing Phase on Recall Mode C - Crosswalk not provided due to vehicle-pedestrian conflict Existing Pedestrian and Bicycle Facilities Figure 7 United Therapeutics Phase 3, Silver Spring, Maryland Page 15

20 DESCRIPTION OF PROPOSED DEVELOENT Phase 3 of the United Therapeutics Silver Spring Campus is located at 1000 Spring Street along the south side of Spring Street west of the intersection of Spring Street and Colesville Road. The proposed development includes up to approximately 115,000 square feet of office/laboratory and approximately 10,000 square feet of retail space. The property currently contains the County s Garage 21, which will be removed. The project will provide one-half of the parking typically required under the Zoning Ordinance. The driveway that provides access to the on-site parking will be located along Spring Street approximately 250 feet west of the Colesville Road, measured along the tangent. 16

21 TRAFFIC VOLUMES Traffic volumes used in this study include existing traffic volumes, the addition of traffic generated by approved and unbuilt developments in the area, and traffic generated by the proposed development, to obtain total future traffic volumes. The MCPB transportation staff directed that the weekday and commuter peak hours be studied. Intersections identified for study by MCPB Area 1 transportation staff are as follows: Spring Street and Cameron Street Spring Street and Site access point Spring Street and Colesville Road Spring Street and Ellsworth Drive Colesville Road and Fenton Street Colesville Road and Georgia Avenue Figure 8 shows the lane designations at the study area intersections. The following sections describe the traffic volumes used in this study. Existing Traffic Volumes Traffic, pedestrian, and bicycle counts were conducted at the study area intersections on Thursday, February 28, 2013 between 6:30 and 9:30 and between 4:00 and 7:00. These counts were used to establish current peak hour traffic conditions. The peak hours at each intersection were established by identifying the peak 60 minutes of vehicle traffic during the and peak hours. Based on these traffic counts, the peak study hours were identified for each intersection as follows: Spring Street and Cameron Street 8:15 to 9:15, 5:00 to 6:00 Spring Street and Colesville Road 8:00 to 9:00, 4:45 to 5:45 Spring Street and Ellsworth Drive 8:30 to 9:30, 5:00 to 6:00 Colesville Road and Fenton Street 7:45 to 8:45, 5:00 to 6:00 Colesville Road and Georgia Avenue 7:45 to 8:45, 5:15 to 6:15 The existing peak hour traffic volumes at the study intersections are shown on Figure 9. The existing peak hour pedestrian and bicycle volumes at the study intersections are shown in Figure 10. The appendix of this report contains the traffic count and pedestrian/bicycle count summaries. 17

22 NOT TO SCALE Proposed Site Driveway Fenton Street/Colesville Road Legend: - Lane Designations Existing Lane Designations Figure 8 United Therapeutics Phase 3, Silver Spring, Maryland Page 18

23 NOT TO SCALE Fenton Street/Colesville Road Legend: XX/XX - / Peak Hour Traffic Volumes *Prohibited movements are shown on this figure as they were observed in the field. For the purpose of the traffic analysis, prohibited movements were not considered and these volumes were added to the through movement along that approach. Existing Peak Hour Traffic Volumes Figure 9 United Therapeutics Phase 3, Silver Spring, Maryland Page 19

24 NOT TO SCALE *Pedestrian movements prohibited Fenton Street/Colesville Road Legend: XX/XX YY/YY / Pedestrian Crossings - / Bicycle Crossings Existing Peak Hour Pedestrian and Bicycle Volumes United Therapeutics Phase 3, Silver Spring, Maryland Figure 10 Page 20

25 Vehicle Trip Generation and Directions of Approach The and peak-hour vehicle-trip generation rates for various land uses in the Silver Spring CBD have been established and are contained in the Planning Board s LATR and TPAR guidelines. These trip generation rates were used for approved and unbuilt developments and for the proposed Phase 3 of the United Therapeutics Silver Spring Campus. The resulting and peak-hour trip generation rates for these land uses are shown in Table 2. Land Use Table 2: Silver Spring CBD Trip Generation Rates Traffic Volumes Peak Hour Peak Hour In Out In Out Office per thousand square feet Residential (high rise) per residential unit Retail per thousand square feet Hotel per room Note: United Therapeutics Phase 3 includes office and laboratory space. In order to represent worst case conditions, the traffic analysis assumed all of the space to be office. Regional trip distributions are contained in the Planning Board s LATR guidelines and were used for assigning trips generated by approved and unbuilt developments. These distributions are shown for office and residential land uses. The office distributions were used for the office, retail, and hotel trips. The resulting percent distributions on the key roadways are listed in Table 3 and shown in Figure 11. Table 3: Distribution of Site Generated Traffic Residential Office and Retail To/From North on Colesville Road 17% 36% To/From South on Colesville Road 26% 6% To/From the North on Georgia Avenue 35% 46% To/From the South on Georgia Avenue 16% 4% To/From East on Fenton Street 6% 8% Background Traffic Volumes Background traffic volumes represent future traffic that would travel through the area intersections without the proposed development. The MCPB transportation staff provided a list of approved and unbuilt developments to be included as part of background traffic in this traffic study as shown in Figure

26 P NOT TO SCALE P SITE P P Legend: 10% - 10% - - Office/Retail and Residential Trip Distribution P - Public Parking Directional Distribution of Development Traffic United Therapeutics Phase 3, Silver Spring, Maryland Figure 11 Page 22

27 NOT TO SCALE 8711 Georgia Ave 1 2 SITE Georgia Ave 5 Downtown Silver Spring City Place Legend: The Fillmore Study Intersection - A&U Development Approved and Unbuilt Developments United Therapeutics Phase 3, Silver Spring, Maryland Figure 12 Page 23

28 Trips were generated for these developments using the trip generation rates for the Silver Spring CBD as shown in Table 1. The list of approved and unbuilt developments and the resulting number of trips based upon these trip rates are shown in Table 4. Development Table 4: Trip Generation for Approved and Unbuilt Developments Quantity Weekday Peak Hour Weekday Peak Hour In Out In Out Downtown Silver Spring (High Rise) 221 D.U City Place (Office) 246,857 SF Fillmore Music Hall Hotel D.U. 189 Rooms Retail 5,500 SF Ofiice Office 219,700 SF Georgia Avenue Retail SGF 6,209 SF Office 185,072 SF Georgia Avenue Retail SG 2,400 SF Residential (High Rise) 160 D.U Total The trips generated by these approved developments were assigned to the area street network based on the direction of approach of development generated traffic described in Table 3 above and based upon the locations of the developments The peak hour assignment of these trips on the area roadways is shown on Figure 13. Background traffic volumes were calculated by adding trips generated by approved and unbuilt developments shown on Figure 13, to the existing traffic volumes, shown on Figure 8. The resulting background traffic volumes are shown on Figure

29 NOT TO SCALE Site Driveway Fenton Street/Colesville Road Legend: XX/XX - / Peak Hour Traffic Volumes Approved and Unbuilt Development Peak Hour Traffic Volumes Figure 13 United Therapeutics Phase 3, Silver Spring, Maryland Page 25

30 NOT TO SCALE Site Driveway Fenton Street/Colesville Road Legend: XX/XX - / Peak Hour Traffic Volumes Background Peak Hour Traffic Volumes Figure 14 United Therapeutics Phase 3, Silver Spring, Maryland Page 26

31 Site Generated Traffic Volumes Site generated traffic volumes were calculated for the United Therapeutics Phase 3 development and are shown in Table 5. Development Table 5: Site Generated Traffic Volumes Phase 3 of the United Therapeutics Silver Spring Campus Peak Hour Peak Hour In Out In Out Office: 115,000 SF Retail: 10,000 SF Total Development The project includes office and laboratory space. In order to represent worst case conditions, the trip generation and traffic analysis assumed all of the space to be office. The trips generated by Phase 3 of the United Therapeutics development were assigned to the area street network based on the direction of approach shown in Table 3 and based on the location of parking. On-site parking will be provided at the rate of one-half the Zoning Ordinance requirement. As a result, one-half of the site generated vehicle trips were assigned to the on-site parking garage. The remaining half of site generated trips were added to the existing County Garage 2, located further west of the site along Spring Street. The assignment of site generated trips is shown on Figure 15. Total Future Traffic Volumes Total future traffic volumes represent future traffic volumes with the inclusion of the proposed United Therapeutics development. These volumes were calculated by adding the site generated trips (shown on Figure 15) to the background traffic volumes (shown on Figure 14). The resulting total future peak hour traffic volumes are shown on Figure

32 NOT TO SCALE Site Driveway Legend: XX/XX - / Peak Hour Traffic Volumes Entrance IN OUT Site Driveway 70/17 13/73 Public Garage 70/17 13/74 Total 140/34 26/147 Site Generated Peak Hour Traffic Volumes Figure 15 United Therapeutics Phase 3, Silver Spring, Maryland Page 28

33 NOT TO SCALE Site Driveway Fenton Street/Colesville Road *Through volumes at the site driveway are estimated based on the approach volumes of the upstream and downstream intersections. Legend: XX/XX - / Peak Hour Traffic Volumes Total Future Peak Hour Traffic Volumes Figure 16 United Therapeutics Phase 3, Silver Spring, Maryland Page 29

34 ASSESSMENT OF TRAFFIC CONDITIONS The following is a discussion of the assessment of traffic conditions. Intersection Capacity Analyses Intersection capacity analyses were conducted for existing, background, and total future traffic volumes. The capacity analyses were conducted utilizing the critical lane volume (CLV) method as called for in Montgomery County s LATR Guidelines. The analyses of existing, background, and total future traffic volumes were based on the existing lane uses at the area intersections, since no programmed roadway improvements were assumed in this study. The results of the capacity analyses are summarized in Table 6. The congestion standard for the Silver Spring CBD, which is a Metro Station Policy Area, is Intersection Table 6: Intersection Capacity Analysis Results Existing Traffic Volumes Background Traffic Volumes Total Future Traffic Volumes Spring Street and Cameron Street Spring Street and Site Access Point Spring Street and Colesville Road Spring Street and Ellsworth Drive Colesville Road and Fenton Street Colesville Road and Georgia Avenue The capacity analysis results show that under existing, background, and total future traffic volume conditions, all of the study intersections operate within the congestion standard for the area. As a result, the proposed Phase 3 of the United Therapeutics Silver Spring Campus will have no adverse impact on the area roadway system. Pedestrian Impact The sidewalks within the proposed development will connect to this existing pedestrian network to provide safe access for pedestrians. The development will provide streetscape improvements (including street trees, pavers, and lighting) along the site frontage on Colesville road and Spring Street. Also, a mid-block pedestrian connection between Colesville Road and Cameron Street will be provided as part of the project. 30

35 Transportation Policy Area Review (TPAR) The recently adopted Transportation Policy Area Review (TPAR) assesses the transit and roadway adequacy of the policy area in which development is proposed. These adequacy standards are used to determine any payment required for mitigation of the development s impact on the surrounding network intersections. The proposed Phase 3 of the United Therapeutics Silver Spring Campus is located in the Silver Spring CBD Policy Area. This policy area is exempt from the transit adequacy test and is adequate under the roadway test. As a result, no TPAR payment is required for the proposed Phase 3 of the United Therapeutics Silver Spring Campus. 31

36 CONCLUSIONS The results of this study show that the area intersections will all operate at acceptable conditions with the Phase 3 of the United Therapeutics Silver Spring Campus. The intersections will operate within the acceptable congestion standard for the area. As a result, the LATR requirements of the Adequate Public Facilities Ordinance are satisfied. In addition, the TPAR test for development in the Silver Spring CBD policy area is satisfied. This policy area is exempt from the transit adequacy test and is adequate under the roadway test. The vehicular trips to this site will be distributed to the site entrance driveway and to nearby County parking facilities. Accordingly, the site access and vehicle circulation along the neighborhood streets will operate in a safe and efficient manner with the addition of the United Therapeutics traffic. The area is well served by transit including Metrorail, MARC, and the bus terminal at the Silver Spring Metrorail Station. Direct pedestrian connections to transit are in place via existing sidewalks. Pedestrian crossing facilities (ramps, crosswalks, pedestrian signal heads) are provided in most locations and pedestrian crossing times are sufficient at all locations. This development will provide streetscape improvements along the site frontage on Colesville Road and Spring Street and a mid-block pedestrian connection between Colesville Road and Cameron Street. 32

37 APPENDIX 33

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41 PL D 2N E AV Montgomery County Planning Area 1 RA EY MS AV E 5 4 ST 1 2 b e SITE Silver Spring CBD Policy Area 3 TO N f FE N a United Therapeutics 1000 Spring Street E AV Transportation AP VE EA FE N ST CA a. Spring Street\ Cameron Street b. Site access point c. Spring Street\ Colesville Road (US 29) d. Spring Street\ Elsworth Drive ST PL e. Colesville Road (US 29)\ Fenton Street G IN IN G N R N A Georgia Avenue (MD 97) f. Colesville Road (US 29)\ SP L P LA K W IC T NS ME RO G c R RI N LE S CO SP RD VIL LE D RR Study Intersections: LA FID LE R O W EL LS RG D G EO IA RT H T Background Developments 1 E AV TH NS Study Intersections NE AY W LO RA T CU TE a R PA NG KI VE d RU PL CU T 300 BO RS PE OE DE R C ED DR E AV N A ST Feet I ST R NT IFA HI NG T 1S Attachment A

42 Fillmore Music Hall On Georgia Ave, 250' west of Colesville Rd 383,082 SF Gross Floor Area on Parcels N217 and N ,700 SF Unbuilt Office; 140,500 Unbuilt Retail (Hotel) Georgia Avenue On Georgia Ave, 75' west of Colesville Rd - Lot 2 191,281 SF Gross Floor Area 185,072 SF Unbuilt Office; 6,209 SF Unbuilt Retail Attachment B Background Developments Traffic Study for the Proposed United Therapeutics Development at 1000 Spring Street 1000 Spring Street, Silver Spring, Maryland # Application No. Project Name Location Number of Units or SF or Other Downtown Silver Spring Bounded by Georgia Ave, Wayne Ave, 221 High-Rise DU's Cedar St, and Ellsworth Dr All Unbuilt City Place SE Quadrant of the Intersection of Colesville Rd 739,269 SF Gross Floor Area and Fenton St 246,857 SF Unbuilt Office Georgia Avenue On Georgia Ave, 250' NE of Cameron St - 2,400 SF Retail; 160 DU Parcels 109 and 107 All Unbuilt SF Square Feet DU Dwelling Units 1 of 1

43 NOTES: 1. THIS PLAN IS NOT FOR CONSTRUCTION PURPOSES. 2. THE BOUNDARY INFORMATION WAS PREPARED FROM PLATS AND DEES OF RECORD. 3. THE TOPOGRAPHY WAS COMMPILED FROM AERIAL SURVEYS, AVAILABLE UTILITY PLANS AND FIELD SURVEY BY MACRIS, HENDRICKS & GLASCOCK, PA 4. THE PROPERTY IS ZONED CBD-1 5. THE WATER & SEWER CATEGORY IS W-1 & S-1 6. THIS SITE IS WITHIN THE SLIGO CREEK WATERSHED, STRE CLASS I. 7. THIS SITE IS WITHIN THE SILVER SPRING CBD SECTOR PLAN. 8. THE ENVIRONMENTAL PLANNING DEPARTMENT OF THE M-NCP&PC HAS APPROVED AN NRI/FSD (REF. # ) 9. A STORMWATER MANAGEMENT CONCEPT HAS BEEN SUBMITTED TO MCDPS FOR REVIEW. 10. A PRELIMINARY FOREST CONSERVATION PLAN HAS BEEN SUMITTED TO THE M-NCP&PC FOR REVIEW. 11. THE LOCATIONS OF EXISTING UNDERGROUND UTILITIES ARE APPROXIMATE LOCATIONS AS PER AVAILABLE 12. UTILITY COMPANY RECORDS. THE EXACT LOCATION OF ALL UNDERGROUND UTILITIES SHOULD BE VERIFED 13. BY MISS UTILITY ( ) PRIOR TO ANY EXCAVATION. MACRIS, HENDRICKS & GLASCOCK DOES NOT EXPRESS OR IMPLY ANY GUARANTEE OR WARRANTY AS TO THE LOCATION OR EXISTENCE OF ANY 14. UNDERGROUND UTILITY. 15. THE MONTGOMERY COUNTY HEALTH DEPARTMENT RECORDS DO NOT INDICATE ANY WELL OR SEPTIC AREAS 16. ON THE SUBJECT SITE. 17. DEVELOENT SHOWN IS SUBJECT TO APPROVAL OF A 59-D-3 SITE DEVELOENT PLAN BY THE M-NCP&PC. 18. DEVELOENT SHOWN IS SUBJECT TO APPROVAL OF A PROJECT PLAN BY THE M-NCP&PC. SITE DATA SUBJECT PROPERTY: L-1963 F-475, L-2407 F-502, L-2424 F-537, L-2446 F-576 PROPOSED LOT 2, UNITED THERAPEUTICS ADDITION TO SILVER SPRING 1000 SPRING STREET PROPERTY AREA: GROSS TRACT AREA 77,822 S.F. or 1.79 AC. PROPOSED PUBLIC R/W DEDICATION 10,239 S.F. or 0.24 AC. NET LOT AREA 67,583 S.F. or 1.55 AC. ZONING CLASSIFICATION: CBD-1 (CENTRAL BUSINESS DISTRICT, FAR 1.0) (OPTIONAL METHOD OF DEVELOENT, FAR 2.0 ALLOWED) PROPOSED USE: OFFICE/LABORATORY = 111,724 G.S.F. RETAIL = 10,000 G.S.F. TOTAL = 121,724 G.S.F. DEVELOENT STANDARDS FOR OPTIONAL METHOD REQUIRED/ALLOWED PROPOSED LOT AREA LOT-2 22,000 S.F. 67,583 S.F./1.55 AC. BUILDING SETBACK REQUIREMENTS NOT REQUIRED, SETBACKS WILL BE ADJACENT TO SPRING ST. (NORTH) ESTABLISHED BY PLANNING 0 ADJACENT TO CERON ST. (WEST) BOARD AT PROJECT PLAN APPROVAL 16 ADJOINING LOTS SOUTH 10 ADJOINING LOTS WEST 0 MAXIMUM BUILDING HEIGHT BUILDING AREA 2.0 FAR 1.56 FAR or 155,644 S.F. or 121,724 S.F. PUBLIC SPACE ON-SITE PUBLIC USE SPACE: 20% OF NET LOT AREA OR 13,517 S.F. 12,950 S.F. or 19.2% ON-SITE PUBLIC USE SPACE CREATED OFF-SITE: 850 S.F. or 1.3% ON-SITE TOTAL 13,800 S.F. or 20.4% OFF-SITE ENITY SPACE: 12,900 S.F. or 19.1% TOTAL 26,700 S.F. or 39.5% OFF STREET PARKING (1) OFFICE/LABORATORY 111,724 S.F. 2.4/1,000 S.F.= 269 RETAIL (AUX) 10,000 S.F. 3.5/1,000 S.F.= 35 TOTAL 304 SPACES 152 SPACES (1) HANDICAP ACCESSIBLE 6 SPACES/2 RESERVED FOR VANS 6 SPACES MOTORCYCLE 2% = 3 SPACES 3 SPACES BICYCLE 1/20 SPACES = 8 8 SPACES AUTOMOBILE PARKING REQUIRED BY MONTGOMERY COUNTY 152 SPACES 152 SPACES (1) THE PROJECT IS LOCATED IN THE SILVER SPRING PARKING LOT DISTRICT AND ON-SITE PARKING SPACES ARE NOT REQUIRED PROVIDED AN APPLICANT PAYS THE PARKING LOT DISTRICT TAX. ADDITIONAL PUBLIC PARKING SPACES ARE PROVIDED IN NEARBY PUBLIC PARKING FACILITIES.

44 VEHICLE TURNING MOVEMENT COUNT - SUMMARY Counted by: VCU Intersection of: Spring St Date: February 28, 2013 Day: Thursday and: Cameron St Weather: Cloudy/Cool Location: Montgomery Co., MD Entered by: RB TRAFFIC FROM NORTH TRAFFIC FROM SOUTH TRAFFIC FROM EAST TRAFFIC FROM WEST TOTAL on: Cameron St on: Cameron St on: Spring St on: Spring St N + S TIME + LEFT THRU RIGHT U-TN TOTAL LEFT THRU RIGHT U-TN TOTAL LEFT THRU RIGHT U-TN TOTAL LEFT THRU RIGHT U-TN TOTAL E + W 6:30-6: :45-7: :00-7: :15-7: :30-7: :45-8: :00-8: :15-8: :30-8: :45-9: :00-9: :15-9: Hr Totals Hr Totals 6:30-7: :45-7: :00-8: :15-8: :30-8: :45-8: :00-9: :15-9: :30-9: PEAK HOUR 8:15-9: :00-4: :15-4: :30-4: :45-5: :00-5: :15-5: :30-5: :45-6: :00-6: :15-6: :30-6: :45-7: Hr Totals Hr Totals 4:00-5: :15-5: :30-5: :45-5: :00-6: :15-6: :30-6: :45-6: :00-7: PEAK HOUR 5:00-6:

45 PEDESTRIAN OBSERVATIONS Counted by: VCU Intersection of: Spring St Date: February 28, 2013 and: Cameron St Weather: Cloudy/Cool Location: Montgomery Co., MD Entered by: RB Day: Thursday Cameron St Cameron St NORTH LEG SOUTH LEG TIME PEDESTRIANS BICYCLES PEDESTRIANS BICYCLES 6:30-6: :45-7: :00-7: :15-7: :30-7: :45-7: :00-8: :15-8: :30-8: :45-9: :00-9: :15-9: TOTALS :00-4: :15-4: :30-4: :45-5: :00-5: :15-5: :30-5: :45-5: :00-6: :15-6: :30-6: :45-7: TOTALS TIME Spring St Spring St EAST LEG WEST LEG PEDESTRIANS BICYCLES PEDESTRIANS BICYCLES 6:30-6: :45-7: :00-7: :15-7: :30-7: :45-7: :00-8: :15-8: :30-8: :45-9: :00-9: :15-9: TOTALS :00-4: :15-4: :30-4: :45-5: :00-5: :15-5: :30-5: :45-5: :00-6: :15-6: :30-6: :45-7: TOTALS

46 VEHICLE TURNING MOVEMENT COUNT - SUMMARY Counted by: VCU Intersection of: Colesville Rd (US 29) Date: February 28, 2013 Day: Thursday and: Spring St Weather: Cloudy/Cool Location: Montgomery Co., MD Entered by: RB TRAFFIC FROM NORTH TRAFFIC FROM SOUTH TRAFFIC FROM EAST TRAFFIC FROM WEST TOTAL on: Colesville Rd on: Colesville Rd on: Spring St on: Spring St N + S TIME + LEFT THRU RIGHT U-TN TOTAL LEFT THRU RIGHT U-TN TOTAL LEFT THRU RIGHT U-TN TOTAL LEFT THRU RIGHT U-TN TOTAL E + W 6:30-6: :45-7: :00-7: :15-7: :30-7: :45-8: :00-8: :15-8: :30-8: :45-9: :00-9: :15-9: Hr Totals Hr Totals 6:30-7: :45-7: :00-8: :15-8: :30-8: :45-8: :00-9: :15-9: :30-9: PEAK HOUR 8:00-9: :00-4: :15-4: :30-4: :45-5: :00-5: :15-5: :30-5: :45-6: :00-6: :15-6: :30-6: :45-7: Hr Totals Hr Totals 4:00-5: :15-5: :30-5: :45-5: :00-6: :15-6: :30-6: :45-6: :00-7: PEAK HOUR 4:45-5:

47 PEDESTRIAN OBSERVATIONS Counted by: VCU Intersection of: Colesville Rd (US 29) Date: February 28, 2013 and: Spring St Weather: Cloudy/Cool Location: Montgomery Co., MD Entered by: RB Day: Thursday Colesville Rd Colesville Rd NORTH LEG SOUTH LEG TIME PEDESTRIANS BICYCLES PEDESTRIANS BICYCLES 6:30-6: :45-7: :00-7: :15-7: :30-7: :45-7: :00-8: :15-8: :30-8: :45-9: :00-9: :15-9: TOTALS :00-4: :15-4: :30-4: :45-5: :00-5: :15-5: :30-5: :45-5: :00-6: :15-6: :30-6: :45-7: TOTALS TIME Spring St Spring St EAST LEG WEST LEG PEDESTRIANS BICYCLES PEDESTRIANS BICYCLES 6:30-6: :45-7: :00-7: :15-7: :30-7: :45-7: :00-8: :15-8: :30-8: :45-9: :00-9: :15-9: TOTALS :00-4: :15-4: :30-4: :45-5: :00-5: :15-5: :30-5: :45-5: :00-6: :15-6: :30-6: :45-7: TOTALS

48 VEHICLE TURNING MOVEMENT COUNT - SUMMARY Counted by: VCU Intersection of: Spring St Date: February 28, 2013 Day: Thursday and: Ellsworth Dr Weather: Cloudy/Cool Location: Montgomery Co., MD Entered by: RB TRAFFIC FROM NORTH TRAFFIC FROM SOUTH TRAFFIC FROM EAST TRAFFIC FROM WEST TOTAL on: Ellsworth Dr on: Ellsworth Dr on: Spring St on: Spring St N + S TIME + LEFT THRU RIGHT U-TN TOTAL LEFT THRU RIGHT U-TN TOTAL LEFT THRU RIGHT U-TN TOTAL LEFT THRU RIGHT U-TN TOTAL E + W 6:30-6: :45-7: :00-7: :15-7: :30-7: :45-8: :00-8: :15-8: :30-8: :45-9: :00-9: :15-9: Hr Totals Hr Totals 6:30-7: :45-7: :00-8: :15-8: :30-8: :45-8: :00-9: :15-9: :30-9: PEAK HOUR 8:30-9: :00-4: :15-4: :30-4: :45-5: :00-5: :15-5: :30-5: :45-6: :00-6: :15-6: :30-6: :45-7: Hr Totals Hr Totals 4:00-5: :15-5: :30-5: :45-5: :00-6: :15-6: :30-6: :45-6: :00-7: PEAK HOUR 5:00-6: