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Mr. Tim Nelson -4- September 15, 1986 <br />TRAFFIC FORECASTING <br />Trip Generation <br />The first step In the traffic forecasting process Is to <br />determine the daily and PM Peak Hour weekday t-lp generation <br />of the proposed development. Analysis of daily traffic <br />volumes can be used to assess general traffic Impacts of the <br />development, while the PM Peak Hour Is the time during which <br />both traffic on adjacent roadways Is busiest and traffic <br />generation by the proposed development Is largest and thus <br />the time during which traffic Impacts of the development <br />would be the greatest. It should be noted that the type of <br />development proposed (essentially office/warehouse) <br />generates traffic mainly during the weekdays, with little <br />nighttime or weekend traffic. As we understand It, approxi- <br />mately one third of the site could develop as commercial <br />retail space which would generate greater nighttime and <br />weekend traffic than this proposal. <br />For the purposes of determining the trips generated by the <br />proposal, it was assumed that the office/service buildings <br />would consist of 75% office/25% warehouse, while the light <br />Industrlai components would consist of 50% office/50% ware- <br />house. It Is expected that the development will actually <br />consist of 50% office/50% warehouse and 20% office/80% ware- <br />house for the office/service and light Industrial components <br />respectively. However, a higher office percentage (which <br />generates more trips) was used for this analysis to analyze <br />the "worst case" scenario which could occur with the <br />proposal. <br />Based upon trip generation rates published by the Inet ltute <br />of Transportation Engineers and Information from previous <br />SenshooF 8 Associates, Inc. studies, expected trip <br />generation (both cars and trucks) of the proposal upon full <br />occupancy was determined. The following table presents the <br />expected trip generation. <br />FULL <br />DEVELOPMENT <br />TRIP GENERATION <br />Daily <br />PM <br />Peak Hour <br />Vehicle Tyke <br />(Two Way) <br />lit <br />Out <br />Total <br />Cars <br />7084 <br />327 <br />1016 <br />1343 <br />Light Trucks <br />530 <br />21 <br />91 <br />112 <br />Combination Trucks <br />50 <br />3 <br />9 <br />12 <br />Total <br />7664 <br />351 <br />1116 <br />1467 <br />