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502K J-04 f'gi t 7 i 3. Peak Direction of 41st Street, from 43'a Avenue to Old Dixie Highway: Eastbound 4. Formula for Determining Number of Peak Hour/Peak Season/Peak Direction Trips Generated: Total Square Footage X P.M. Peak Hour Rate X Inbound PAL Percentage X Inbound -Southbound Percentage (187,000 X 5.2.3/1,000 X.5 X.53 = 259) (trip distribution based on a Modified Gravity Model) 5. Formula for Determining Number of Average Weekday Trips Generated: Total Square Footage X Average Weekday Rate (187,000 X 56/1,000 sq.ft. =10,472) 6. Traffic Capacity on this segment of 41st Street, at a Level of Service "D": 880 peak hour/peak season/peak direction trips 7. Total Segment Demand (existing volume + vested volume) on this segment of 41 st Street: 206 peak hour/peak season/peak direction trips The number of Average Weekday Trip Ends associated with the most intense use of the subject property under the existing land use designation is 1,889. This was determined by multiplying the 187 units (most intense use) by ITE's single-family residential factor of 10.1 Average Daily Trip Ends/unit. The number of Average Weekday Trip Ends associated with the most intense use of the subject property under the proposed land use designation is 10,472. This was determined by multiplying the 187,000 square feet of shopping center use (most intense use) by ITE's shopping center fitted curve factor of 56 Average Daily Trip Ends/1,000 square feet. Since the county's transportation level of service is based on peak hour/peak season/peak direction characteristics, the transportation concurrency analysis addresses project traffic occurring in the peak hour and affecting the peak direction of impacted roadways. According to ITE, the proposed use generates more volume in the p.m. peak hour than in the am. peak hour. Therefore, the p.m. peak hour was used in the transportation concurrency analysis. The peak direction during the p.m. peak hour on 419 Street is eastbound. Given those conditions, the number of peak hour/peak season/peak direction trips that would be generated by the most intense use of the subject property under the existing land use designation was calculated to be 65. This was determined by multiplying the total number of units allowed (187) under the existing land use designation by ITE's factor of 1.01 p.m. peak hour tripstunit, to determine the total number of trips generated Of these trips, 65% (123) will be inbound and 35% (64) will be outbound Of the inbound trips, 53% or 65 will be eastbound To determine the number of peak hour/peak season/peak direction trips that would be generated by the most intense use of the subject property under the proposed land use designation, the total square footage of shopping center allowed under the proposed amendment (187,000) was multiplied by ITE's factor of 5.23 p.m. peak hour trips/1,000 square feet to determine the total number of trips generated (978). Of these trips, 50% (489) will be inbound and 50% (489) will be outbound Of the inbound trips, 53% or 259 will be eastbound Therefore, the most intense use of the subject property under the proposed land use designation would generate 194 (259 - 65 =194) more peak hour/peak season/peak direction trips than the 65 that would be generated by the most intense use of the subject property under the existing land use designation. Using a modified gravity model and a hand assignment, the peak hour/peak season/peak direction trips generated by the proposed use were then assigned to impacted roads on the network. Impacted roads are defined in section 910.09(4)(b)3 of the county's LDRs as roadway segments which receive five percent (5%) or more of the project traffic or fifty (50) or more of the project trips, whichever is less. Capacities for all roadway segments in Indian River County are calculated and updated annually, utilizing the latest and best available peak season traffic characteristics and applying Appendix G methodology as set forth in the Florida Department of Transportation Level of Service Manual. Available capacity is the total capacity less existing and committed (vested) traffic volumes; this is updated daily based upon vesting associated with project approvals. The traffic capacity for the segment of 41st Street adjacent to this site is 880 trips (peak hour/peak season/peak direction) at Level of Service (LOS) "D", while the Total Segment Demand (existing traffic volume + vested traffic volume) on this segment of 41 st Street is 227 trips (peak hour/peak season/peak direction). The additional 259 peak hour/peak season/peak direction trips created by the most intense use of the subject property under the proposed amendment would increase the Total Segment Demand peak hour/peak season/peak direction trips for this segment of 41' Street to approximately 486. MARCH 10, 1998 0 -22- •