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December 30, 2019 NorthPoint Development Trip Generation Study 14 6) TRUCK TRAFFIC The percent of truck traffic for NorthPoint Development’s study sites is summarized in Table 12 below. Table 12: Percent Truck Traffic Building Type Weekday AM PEAK Generator PM PEAK Generator AM PEAK Adj. St. AM PEAK Adj. St. Rear Loading Dock 15% 16% 9% 17% 10% Large Cross Dock 19% 9% 7% 7% 9% Smaller Cross Dock 24% 20% 13% 22% 21% All Cross Dock 22% 16% 10% 15% 14% Overall Aggregate 19% 16% 10% 16% 12% 7) CONCLUSIONS As previously discussed, rear loading dock buildings had trip generation rates higher than the comparative ITE Land Uses in the analysis. The sample size for this type of building was relatively small, seven sites at two locations. Overall there were only eight of the twenty-eight buildings in the complete study that had a weekday trip generation greater than nine hundred vehicles. Three of these eight buildings were rear loading facilities. It is recommended that additional sites be evaluated to determine if the typical user of a rear loading facility has a significantly higher rate than cross dock facilities. Until such additional analysis is performed, using ITE Land USE 140 for Peak Hour trip generation rates and the rear loading weekday trip rate should provide a conservative estimate of trip generation when square footage GFA is used as the independent variable. Until additional rear loading dock sites can be evaluated, no additional recommendations are being made for using employees as the independent variable beyond providing the observed trip generation rates for the limited sample size. The analysis of trip generation rates for all sizes of cross dock facilities correlate very well with ITE Land USE 154 when evaluating square footage GFA as the independent variable. Given the robust data set (five study locations in two states with twenty-one individual sites) traffic engineers should have confidence in using either ITE Land Use 154 or the NorthPoint specific trip generation rates to give an accurate estimate of potential trips generated. ITE has not yet disseminated trip generation data on an employee basis for Land Use 154 yet. If the number of employees is to be used as the independent variable, the evaluated land use with the closest correlation is Land Use 140. Using a Northpoint specific trip generation based upon the combined cross dock trip generation rates (Table 10) should provide a reasonable estimate of the trips generated.