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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 />C. 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 (9 X 1.01 X .65 = 6) <br />(trip distribution based on a Modified Gravity Model) <br />4. Formula for Determining Number of Average Weekday Trips <br />Generated: Number of Units X Average Weekday Rate <br />(9 X 9.55 = 86) <br />5. Peak Direction of 58th Avenue, from S.R. 60 to 41st Street: <br />Northbound <br />6. Traffic Capacity on this segment of 58th Avenue, at a Level of <br />Service "D": 830 peak hour/peak season/peak direction trips <br />7. Existing Traffic volume on this segment of 58th Avenue: <br />523 peak hour/peak season/peak direction trips <br />The number of Average Weekday Trip Ends associated with the most <br />intense use of the subject property under the existing zoning <br />district is 10. This was determined by multiplying the 1 unit <br />(most intense use) by ITE's single-family residential factor of <br />9.55 Average Daily 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 zoning <br />district is 86. This was determined by multiplying the 9 units <br />(most intense use) by ITE's single-family residential factor of <br />9.55 Average Daily 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. The <br />peak direction on 58th Avenue during the p.m. peak hour is <br />northbound. <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 zoning district was <br />calculated to be 1. This was determined by multiplying the total <br />number of units allowed (1) under the existing zoning by ITE's <br />factor of 1.01 p.m. peak hour trips/unit, then taking 65% of that <br />total to ensure that only inbound trips were counted. <br />To determine the number of peak hour/peak season/peak direction <br />trips that would be generated by the most intense use of the <br />subject property under the proposed zoning district, the total <br />number of units allowed under the proposed zoning (9) was <br />multiplied by ITE's factor of 1.01 p.m. peak hour trips/unit; that <br />volume was then multiplied by the inbound trip factor of 0.65. The <br />result was 6, or 5 more than the 1 that would be generated by the <br />most intense use of the subject property under the existing zoning. <br />Using a modified gravity model and a hand assignment, the trips <br />27 <br />NOV - 91993 <br />BOOK 90 PAGE 972 2 <br />