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ProDosed Land Use Designation <br />BOOK 8 9 F',i IF -1 <br />,,.872 <br />1. Residential Use Identified in 5th Edition ITE Manual: Single - <br />Family <br />2. For Single -Family Units, in ITE Manual: <br />a. Average Weekday Trip Ends: 9.55/unit <br />b. P.M. Peak Hour Trip Ends: 1.01/unit <br />ce Inbound (P.M. Peak Hour): 65% <br />d. Outbound (P.M. Peak Hour): 35% <br />3. Formula for Determining Number of Peak Hour/Peak Season/Peak <br />Direction Trips Generated: Number of Units X P.M. Peak Hour <br />Rate X Inbound P.M. Percentage (3200 X 1.01 X 0.65 = 2100) <br />4. Formula for Determining Number of Average Weekday Trips <br />Generated: Number of Units X Average Weekday Rate <br />(3200 X 9.55 = 30,560) <br />The number of Average Weekday Trip Ends associated with the most <br />intense use of the subject property under the present land use <br />designation is 6112. This was determined by multiplying the 640 <br />units (most intense use) by ITE's single-family residential factor <br />of 9.55 Average Weekday Trip Ends/unit. <br />The number of Average Weekday Trip Ends associated with the most <br />intense use of the subject property under the proposed land use <br />designation is 30,560. This was determined by multiplying the 3200 <br />units (most intense use), by ITE's single-family residential factor <br />of 9.55 Average Weekday Trip Ends/unit. <br />Since the county's transportation level of service is based on peak <br />hour/peak season/peak direction characteristics,, the transportation <br />concurrency analysis addresses project traffic occurring in the <br />peak hour and affecting the peak direction of impacted roadways. <br />According to ITE, the proposed use generates more volume in the <br />p.m. peak hour than in the a.m,. peak hour. Therefore, the p.m. <br />peak hour was used in the transportation concurrency analysis. <br />Given those conditions, the number of peak hour/peak season/peak <br />direction trips that would be generated by the most intense use of <br />the subject property under the existing land use designation was <br />calculated to be 420. This was determined by multiplying the total <br />number of units allowed under the existing land use designation <br />(640) by ITE's factor of 1.01 p.m. peak hour trips/unit,, then <br />taking 65% of that total to ensure that only inbound trips were <br />counted. <br />To determine the number of peak hour/peak season/peak direction <br />trips that would be generated throughout the county by the most <br />intense use of the subject property under the proposed land use <br />designation, the total number of units allowed under the proposed <br />land use designation (3200) was multiplied by ITE's factor of 1.01 <br />p.m. peak hour trips/unit; that volume was then multiplied by the <br />inbound trip factor of 0.65. The result was 2100, or 1680 more <br />than the 420 that would be generated by the most intense use of the <br />subject property under the existing land use designation, Using a <br />modified gravity model and a hand assignment, the trips generated <br />by the proposed land use designation were then assigned to roadways <br />on the network. <br />