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n <br />DF r - 7 14 BOOK 91 FACE 1.3 <br />5. Formula for Determining Number of Average Weekday Trips <br />Generated: Number of Units X Average Weekday Rate <br />(477 X 9.55 = 4,555) <br />6. Traffic Capacity on this segment of C.R. 510, at a Level of <br />Service "D": 630 peak hour/peak season/peak direction trips <br />7. Existing Traffic volume on this segment of C.R. 510: <br />422 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 land use <br />designation is 1,518. This was determined by multiplying the 159 <br />units (most intense use) by ITE's single-family residential factor <br />of 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 land use <br />designation is 4,555. This was determined by multiplying the 477 <br />units (most intense use), by ITE's single-family residential factor <br />of 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 during the p.m. peak hour on C.R. 510 is westbound. <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 78. This was determined by multiplying the total <br />number of units allowed (159) under the existing land use <br />designation by ITE's factor of 1.01 p.m. peak hour trips/unit, to <br />determine the total number of trips generated. Of these trips, 65% <br />(104) will be inbound and 35% (56) will be outbound. Of the <br />inbound trips, 75% or 78 will be westbound. <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 land use designation, the total <br />number of units allowed under the proposed amendment (477) was <br />multiplied by ITE's factor of 1.01 p.m. peak hour trips/unit to <br />determine the total number of trips generated (482). Of these <br />trips, 65% (313) will be inbound and 35% (169) will be outbound. <br />Of the inbound trips, 75% or 235 will, be westbound. Therefore, the <br />most intense use of the subject property under the proposed land <br />use designation would generate 157 ( 235 - 78 = 157 ) more trips than <br />would be generated by the most intense use of the subject property <br />under the existing land use designation. <br />Using a modified gravity model and a hand assignment, the peak <br />hour/peak season/peak direction trips generated by the proposed use <br />were then assigned to impacted roads on the network. Impacted <br />roads are defined in section 910.09(4)(b)3 of the county's Land <br />Development Regulations as roadway segments which receive five <br />percent (5%) or more of the project traffic or fifty (50) or more <br />of the project trips, whichever is less. <br />Capacities for all roadway segments in Indian River County are <br />calculated and updated annually, utilizing the latest and best <br />available peak season traffic characteristics and applying Appendix <br />32 <br />M <br />