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Home My WebLink About03-06 Traffic Impact Analysis (2)o A Traffic Impact Analysis of the Global Stone Located in Middletown, Virginia Prepared for: O -N Minerals Chemstone Operation 1696 Oranda Road P.O. Box 71 Strasburg, VA 22657 Prepared by: Patton Harris Rust Associates, pc End neers. Surveyors. Planner. LmdscgDe k chitects. 300 Foxcroff Avenue, p RA T 304 264. 9 West Virginia 251 Ol March 15, 2005 OVERVIEW Report Summary Patton Harris Rust Associates, pc (PHR +A) has prepared this document to present the traffic impacts associated with the rezoning of land parcels located adjacent to the existing Global Stone facility in Middletown, Virginia. Currently, the site accommodates 26 employees per day, 19 Global Stone trucks per day and 50 customer trucks per day. The proposed expansion could increase the number of employees by 14 per day, the number of Global Stone trucks by 80 per day and the number of customer trucks by 56 per day. This report also examines a scenario that would eliminate all Global Stone truck traffic by implementing a conveyer belt system across Cedar Creek. Primary access to the facility will be provided via a single site driveway located west of the Route 625 (5` Street)/ US Route 11 (Main Street) intersection. The proposed development will be built out over a single transportation phase by the year 2008. Figure 1 is provided to illustrate the location of the Global Stone with respect to the surrounding roadway network. Methodology The traffic impacts accompanying the Global Stone development were obtained through a sequence of activities as the narratives that follow document: Assessment of background traffic including other planned projects in the area of impact, Calculation of trip generation for the Global Stone, Distribution and assignment of the Global Stone generated trips onto the completed roadway network, Analysis of capacity and level of service using the latest version of the highway capacity software, HCS -2000, for existing and future conditions. EXISTING CONDITIONS Patton Harris Rust Associates (PHR &A) conducted manual AM and PM peak hour vehicle classification counts at the intersection of Route 625 (5 Street)/ US Route 11 (Main Street) in Middletown, Virginia. ADT (Average Daily Trips) was established along each of the study area roadway links using a "k" factor (the ratio of PM peak hour traffic volumes to 24 -hour traffic volumes) of 10 Figure 2 shows the existing ADT and AM/PM peak hour traffic volumes at the intersection of Route 625 (5 Street)/ US Route 11 (Main Street). Figure 3 shows the respective existing lane geometry and AM/PM peak hour levels of service. All traffic count data and HCS -2000 levels of service worksheets are included in the Appendix section of this report. A Traffic Impact Analysis of the Global Stone Project Number: 11279 -2 -0 March 15, 2005 Page 1 Hl Figure 2 Existing Traffic Conditions A Traffic Impact Analysis of the Global Stone Project Number: 11279 -2 -0 March 15, 2005 Page 3 No Scale SITE Unsignalized Intersection Q 1 Denotes Unsignalized Critical Movement AM Peak Hour (PM Peak Hour) =PHR Figure 3 Existing Lane Geometry. and Levels of Service A Traffic Impact Analysis of the Global Stone Project Number: 11279 -2 -0 March 15, 2005 Page 4 2008 BACKGROUND CONDITIONS Existing traffic volumes were increased along Route 11 using a conservative annual growth rate of two percent (2 as determined based upon historic traffic growth for the area. Figure 4 shows the 2008 background ADT and AM/PM peak hour traffic volumes at the intersection of Route 625 (5 Street)/ US Route 11 (Main Street). Figure 5 shows the respective 2008 background lane geometry and AM/PM peak hour levels of service. All HCS -2000 levels of service worksheets are included in the Appendix section of this report. TRIP GENERATION Currently, the Global Stone facility accommodates 26 employees per day, 19 Global Stone trucks per day and 50 customer trucks per day. As a result of the rezoning of adjacent land parcels, the development could increase (at a worst -case) by 14 employees per day; 80 Global Stone trucks per day and 56 customer trucks per day. PHR +A has analyzed two (2) alternative scenarios for the site: 1) Scenario #1 assumes the implementation of a conveyer belt system that would transport material across Cedar Creek whereby eliminating the internal Global Stone truck traffic, 2) Scenario #2 assumes the existing metholdology for transporting material across Cedar Creek (via Global Stone trucks). The trip generation for the Global Stone facility was interpolated from existing traffic counts and assumptions based upon the current and proposed land uses. Table 1 shows the trip generation results for the Global Stone development. Table 1 Global Stone Trip Generation Summary A Traffic Impact Analysis of the Global Stone Project Number: 11279 -2 -0 March 15, 2005 Page 5 In Ml Peak Hour Out Total In PM Peak Hour Out Total ADT Existing 26 Employees 4 5 9 5 4 10 139 19 Global Trucks 3 3 7 4 3 7 101 50 Customer Trucks 8 9 17 11 8 18 267 Total Existing Trips 16 17 33 20 15 35 507 Scenario I(via Conveyer Belt System) 40 Employees +14) 2 3 5 3 2 5 75 0 Global Trucks -19) -3 -3 -7 -4 -3 -7 -101 106 Customer Trucks +56) 9 10 19 12 9 21 299 Worst -case Scenario 1 Trip Differential +9 +9 +18 +11 +8 +19 +272 Total (Existing Scenario 1) 25 26 51 31 23 54 779 Scenario 2 (via Global Stone trucks) 40 Employees +14) 2 3 5 3 2 5 75 99 Global Trucks +80) 13 14 28 17 13 29 427 106 Customer Trucks +56) 9 10 19 12 9 21 299 Worst -case Scenario 2 Trip Differential +25 +27 +52 +32 +24 +55 +801 Total (Existing Scenario 2) 41 44 85 52 39 90 1,308 2008 BACKGROUND CONDITIONS Existing traffic volumes were increased along Route 11 using a conservative annual growth rate of two percent (2 as determined based upon historic traffic growth for the area. Figure 4 shows the 2008 background ADT and AM/PM peak hour traffic volumes at the intersection of Route 625 (5 Street)/ US Route 11 (Main Street). Figure 5 shows the respective 2008 background lane geometry and AM/PM peak hour levels of service. All HCS -2000 levels of service worksheets are included in the Appendix section of this report. TRIP GENERATION Currently, the Global Stone facility accommodates 26 employees per day, 19 Global Stone trucks per day and 50 customer trucks per day. As a result of the rezoning of adjacent land parcels, the development could increase (at a worst -case) by 14 employees per day; 80 Global Stone trucks per day and 56 customer trucks per day. PHR +A has analyzed two (2) alternative scenarios for the site: 1) Scenario #1 assumes the implementation of a conveyer belt system that would transport material across Cedar Creek whereby eliminating the internal Global Stone truck traffic, 2) Scenario #2 assumes the existing metholdology for transporting material across Cedar Creek (via Global Stone trucks). The trip generation for the Global Stone facility was interpolated from existing traffic counts and assumptions based upon the current and proposed land uses. Table 1 shows the trip generation results for the Global Stone development. Table 1 Global Stone Trip Generation Summary A Traffic Impact Analysis of the Global Stone Project Number: 11279 -2 -0 March 15, 2005 Page 5 No Scale SITE AM Peak Hour(PM Peak Hour) nit ;ie age)Daib Trips,':, PHA Figure 4 2008 Background Traffic Conditions A Traffic Impact Analysis of the Global Stone Project Number: 11279 -2 -0 March 15, 2005 Page 6 _P Figure 5 PLJ L No Scale SITE Unsignalized Intersection Denotes Unsignalized Critical Movement AM Peak Hour (PM Peak Hour) 2008 Background Lane Geometry and Levels of Service A Traffic Impact Analysis of the Global Stone Project Number: 11279 -2 -0 March 15, 2005 Page 7 2008 BUILD -OUT CONDITIONS CONCLUSION P WAH I o TRIP DISTRIBUTION AND TRIP ASSIGNMENT The distribution of trips was based upon existing travel patterns at the Route 11 (Main Street)/ Route 625 (5 Street) intersection. Figure 6 represents the trip distribution percentages into and out of the proposed Global Stone development. Figures 7a and 7b show the respective development generated AM/PM peak hour trips and ADT assignments at the intersection of Route 625 US Route 11 for Scenarios #1 and #2, respectively. Global Stone assigned trips (Figure 7) were added to the 2008 background traffic volumes (Figure 4) to obtain 2008 build -out conditions. Figures 8a and 8b show the 2008 build -out ADT and AM/PM peak hour traffic volumes at the intersection of Route 11 (Main Street)/ Route 625 (5 Street) for Scenarios #1 and #2, respectively. Figures 9a and 9b show the respective 2008 build -out lane geometry and AM/PM peak hour levels of service. All HCS -2000 levels of service worksheets are included in the Appendix section of this report. The traffic impacts associated with the Global Stone development are acceptable and manageable. Based upon HCS -2000 results, the intersection of Route 11 (Main Street)/ Route 625 (5 Street) will operate with levels of service `B" or better during 2008 build out conditions for Scenarios #1 and #2, respectively. A Traffic Impact Analysis of the Global Stone Project Number: 11279 -2-0 March 15, 2005 Page 8 Trip Distribution Percentages A Traffic Impact Analysis of the Global Stone Project Number: 11279 -2 -0 March 15, 2005 Page 9 No Scale SITE Note: Negative values are due to the elimination of Global Stone trucks as result of the conveyor belt system AM Peak Hour(PM Peak Hour) ,Ai•erage DatlpTrips -P Figure 7a Scenario #1: Trip Assignments P A Traffic Impact Analysis of the Global Stone Project Number: 11279 -2 -0 March 15, 2005 Page 10 Figure 7b Scenario #2: Trip Assignments A Traffic Impact Analysis of the Global Stone Project Number: 11279 -2 -0 March 15, 2005 Page 11 No Scale SITE AM Peak Hour(PM Peak Hour) averageDail}.TfpS i; �H Figure 8a Scenario #1: 2008 Build -out Traffic Conditions A Traffic Impact Analysis of the Global Stone Project Number: 11279 -2 -0 March 15, 2005 Page 12 No Scale SITE AM Peak Hour(PM Peak Hour) A� erase Dail} Trips PHA F Figure 8b P Scenario #2: 2008 Build -out Traffic Conditions A Traffic Impact Analysis of the Global Stone Project Number: 11279 -2 -0 March 15, 2005 Page 13 No Scale SITE Unsignalized Intersection Denotes Unsignalized Critical Movement AM Peak Hour (PM Peak Hour) =PH Figure 9a Scenario 4#1: 2008 Build -out Lane Geometry and Levels of Service i I A Traffic Impact Analysis of the Global Stone Project Number: 11279 -2 -0 March 15, 2005 Page 14 No Scale SITE Unsignalized Intersection Denotes Unsignalized Critical Movement AM Peak Hour (PM Peak Hour) -P Figure 9b Scenario #2: 2008 Build -out Lane Geometry and Levels of Service A Traffic Impact Analysis of the Global Stone Project Number: 11279 -2 -0 March 15, 2005 Page 15