HomeMy WebLinkAbout011 TruNorth Center Traffic Demand Report TruNorth Center Traffic Demand Report TruNorth Center Traffic Demand Report Summary This report outlines the estimated trip generation of the TruNorth Center Development. The calculated PM Peak Hour Trip was compared to the proposed trip generation outlined in the Traffic Impact Study (TIS) that was submitted as part of the Master Site Plan. This report finds that the trip generation for the TruNorth Center Development is similar to the proposed trip generation calculated for the Master Site Plan and therefore the TIS submitted with the Master Site Plan should be an adequate summary of the traffic impact imposed by our development. Proposed Project Demand The proposed TruNorth Center consists of two buildings, an office building and a coffee/donut shop. The future office building is an 11,626 SF two-story structure and the coffee/donut shop building is a two-story structure with a basement, totaling 5,148 SF. The ‘Institute of Transportation Engineers Trip Generation Manual 11th Ed.’ was used to obtain PM Peak Hour, AM Peak Hour, and Average Daily trip generation rates. For the office building trip generations of 1.44 trips/1,000 SF (PM Peak Hour), 1.52/1,000 SF (AM Peak Hour), and 10.75/1,000 SF (Avg. Daily) (710 General Office Building, General Urban/Suburban) were used. PM Peak Hour:
TruNorth Center Traffic Demand Report and a seating/dining and balcony on the second floor. The remaining 3,645 SF which will be solely used by staff can be better represented by utilizing the rates for an office space that were used for the Tru North Office Building. PM Peak Hour:
TruNorth Center Traffic Demand Report PM Peak Hour:
TruNorth Center Traffic Demand Report Peak Hour trips are expected to be generated by the Alza Coffee/Donut Shop. These trips will mainly represent the high-turnover trips produced by the drive-through window. The queuing analysis outlined below further analyzes the efficiency of these trips and traffic/wait times generated by the Alza Coffee/Donut Shop. The fact that the Avg. daily trips proposed by the new development are expected to be around 200 trips/day less than what was previously approved development suggests that the overall traffic impact will not increase, and the past TIS is sufficient in analyzing the traffic impact of this development. Queuing Analysis A queuing analysis was performed to determine that there is sufficient space for the Alza Coffee/Donut Shop drive-through and the queue will not extend into public right-of way, interrupting the flow of traffic. Exhibit 1 displays that per BMC 38.540.020.N, there is adequate space for six vehicles, and a queue of six vehicles will not encroach on public right-of-way. Exhibit 1: Queuing. Six vehicles can fit within the drive-through drive lane and there is an additional 124’ before the Public Right-of-way that could accommodate another five vehicles. A space length of 24’ was used as this is the length required by the code for parallel parking spaces. This length is conservative for queuing length as vehicles will only be traveling forward. Per the attached queuing analysis (013 Queuing Analysis Letter), the expected maximum queue is six vehicles and the calculations show a 95 percent confidence that a queue will not back up to the point where it would begin to impact traffic operations within the site. This project will require the approval of the City of Bozeman Engineering Department.