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HomeMy WebLinkAboutSAMS CLUB FUEL STATION - MJA200002 - SUBMITTAL DOCUMENTS - ROUND 4 - TRANSPORTATION ISSUE Prepared for SAM’S CLUB Queuing Analysis October 16, 2020 SAM’S CLUB FUEL STATION #6633 T08-20003-00 Fort Collins, Colorado Interim Review Only Document Incomplete: Not intended for permit or construction Engineer: Thomas Duncan, P.E. PTOE. P.E. Serial No. 0044552 Date: October 16, 2020 Walter P. Moore and Associates, Inc. CDORA Firm Registration No. 19991038307 INTRODUCTION As requested by Sam’s Club, Walter P Moore conducted a traffic impact analysis for a new Sam’s Club Fuel station in Fort Collins, Colorado. Also, a queuing analysis was performed at the new Fuel station. The purpose of the study was to determine the potential impacts to traffic operations in the area related to the proposed redevelopment. Transportation and site improvements to mitigate impacts were investigated, if necessary. AREA CONDITIONS The new Sam’s Club Fuel station is located in Fort Collins in the existing Sam’s Club parking lot. The site is bordered by the South Lemay Avenue to the east, East Boardwalk Drive to the west, East Harmony Road to the north, and Oakridge Drive to the south. A site location map showing the general location of the proposed development is provided in Figure 1. Figure 1: General Location of the Proposed Development PLANNED DEVELOPMENT SITE DEVELOPMENT The new Sam’s Club fuel station has 12 fueling locations, which are six double sided pump stations. It is anticipated to open in late 2020. Figure 2 shows the proposed Fuel station layout. Figure 2: Proposed Fuel Station Layout PROJECTED CONDITIONS TRIP GENERATION To complete a Traffic Impact Analysis for the proposed development, the number of trips expected to be generated by the planned facilities must be determined. The number of trips generated by the development during an average weekday, and for weekday peak hours, is based on the land use type and size of the development. Standard rates for Sam’s Club Fuel station (Land Use 944 – Service - Gasoline/Gas Station) from the Institute of Transportation Engineers (ITE) publication, Trip Generation, 10th edition, were used to determine the amount of traffic generated by the development. The average rates were used to estimate trips generated during the AM Peak Hour and PM Peak Hour in accordance with the City Traffic Impact Study Guidelines. The average trip generation rates with the directional distribution are presented in Table 1. Table 1: Trip Generation QUEUING ANALYSIS AT FUEL STATION A simplified queuing analysis was performed at the Fuel Station for the north to south one-way circulation of the vehicles. To determine a queue length, a constant arrival rate is assumed within the study hour. Preference of arriving vehicles is assumed to be indifferent to the pumps and vehicles were served on the basis of first-come first-served. ARRIVAL RATE Arrival rate is determined based on the trips generated by the new Fuel Station. The PM peak hour volume of 84 vehicles was used for the analysis. With 12-pumps, the arrival rate becomes 7 vehicles per hour per pump or approximately 8.5 minutes of inter-arrival time. SERVICE RATE The average service rate at each service pump was determined by engineering judgement and observations made at a typical Sam’s Club Fuel Station. At the Sam’s Club fuel station, vehicles do not occupy the service pump after fueling up in contrast to at a retail gas station with convenience store. Therefore, time spent by a vehicle was measured to get the average service rate per hour per service pump. The average service time was found to be 6 minutes. Average Total % enter Enter % exit Exit Average Total % enter Enter % exit Exit Sam's Club 944 Service - Gasoline/Gas Station 12 Vehicle Fueling Positions Average Rate 10.28 123 50%62 50%62 14.03 168 50%84 50%84 New Development Trip Generation Development ITE Code Trip Generation Land Use Size Unit ITE Rec. Method AM Peak Hour PM Peak Hour Buildout-2020 QUEUING As shown in Figure 2, six bays are available for vehicles to queue before fueling at the pump. Therefore, at each bay, there is a capacity of two vehicles when both the pumps are occupied. Such a queuing can be formulated as a single-channel, multiple-server G/G/c/K, where G represents a constant hourly distribution of inter-arrival time as well as service time, c = 2 servers, and K = 2, capacity of the queue. Thus, analyzing the inter-arrival time to the service time, there should not be spill-over at the new Fuel station resulting in a queue.