05-19-16 Regular Meeting of the Planning and Zoning Commission

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EXHIBIT C III. Projected Traffic If given the expected type of land use, its respective location within a roadway corridor, as well as some idea of access locations, a general estimation of new traffic demand for a proposed land use on a roadway or particular intersection can be made. This process is usually completed with the assistance of Trip Generation (2). Trip Generation is a compilation of over 5,500 studies of traffic characteristics generated at various land uses. The traffic projected using techniques outlined in Trip Generation must be viewed exclusively as traffic demand estimates, with some variation expected after full build-out and occupancy of the proposed development. A. Traffic Projection Details. The existing turning movement counts collected in March 2016 quantified the traffic volumes currently using the roadway facilities in the study area. No other significant developments in the immediate area were believed to influence traffic in the base condition year (2018), but further development of the Port Crossing Commerce center could impact these projections. However, assumed for this study is a 3% per year growth rate for background traffic on the roadway network. This additional traffic is generated by normal growth of the area. B. Site Traffic Traffic generated by the proposed site for the weekday peak hours was estimated using the ITE Trip Generation Manual. The proposed development will consist a single distribution building of 193,586 square feet. The site is expected to generate about 860 trips daily, with 118 trips to and from the site during the weekday A.M. peak hour, and about 90 trips during the P.M. peak hour (see Table C1). Distribution centers typically generate about 10-20% of daily trips by trucks, with fewer (around 5-10%) during the peak hours. Once trips were generated for the peak hours of the study, the trip distribution and assignment portion of the analysis could be completed. A generalized form of the gravity model was used to estimate site trip distribution. The trip distribution and assignment exercise was accomplished manually using spreadsheet solution. Exhibits A8 & A9 present the trip distribution percentages used for this study, With Exhibits A10 & A11 showing the driveway trip distributions. Table C2 presents the trip distribution and assignment exercise. This table shows the origins and destinations, trip distribution percentages to each origin and destination pair and the assumed routing for each to each site driveway. Trips were distributed: Page 12 Voigt Associates, Inc. Project 30605 GCP 16 Street Traffic Impact Analysis th March 2016 Prepared for Generational Commercial