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Fr-- <br />�-y., <br />BOOK iUJ PAGE /61 <br />intense use of the site would be 1,360,000 square feet of retail shopping center. Such a development <br />would be nearly as large as the 1,500,000 square foot Indian River Mall Regional Shopping Center <br />Project. A review of the traffic impacts that would result from such a development on the subject <br />property indicates that the existing level of service "D" or better on impacted roadways would not <br />be lowered The site information used for determining traffic impacts is as follows: <br />1. Use Identified in 6th Edition ITE Manual: Shopping Center <br />2. For 1,360,000 sq.ft. Shopping Centers in 6th Edition ITE Manual: <br />a. P.M. Peak Hour Trip Ends: 2.33/1,000 square feet <br />b. Inbound (P.M. Peak Hour): 50% <br />i. Northbound (P.M. Peak Hour): 60% <br />ii. Southbound (P.M. Peak Hour): 40% <br />C. Outbound (P.M. Peak Hour): 50% <br />i. Northbound (P.M. Peak Hour): 40% <br />ii. Southbound (P.M. Peak Hour): 60% <br />3. Peak Direction of Indian River Boulevard, from Vero Beach city limits to 53`d Street: <br />Northbound <br />4. Percentage of Project Trips on This Segment of Indian River Boulevard: 50 <br />5. Formula for Determining Number of Peak Hour/Peak Season/Peak Direction Trips <br />Generated on the Most Impacted Segment of the Roadway Network (Indian River <br />Boulevard): Total Square Footage X P.M. Peak Hour Rate X Inbound P.M. Percentage <br />X Inbound -Northbound Percentage X Percentage of Trips on Indian River Boulevard <br />(1,3609000 X 2.33/19000 X.5 X.6 X.5 = 476) <br />6. Traffic Capacity on this segment of Indian River Boulevard, at a Level of Service "D": <br />1,890 peak hour/peak season/peak direction trips <br />7. Total Segment Demand (existing volume + vested volume) on this segment of Indian River <br />Boulevard: 679 peak hour/peak season/peak direction trips <br />To determine the number of trips that would be generated by the most intense use of the subject <br />property under the proposed zoning district, the maximum square footage allowed under the <br />proposed zoning (1,360,000) was multiplied by ITE's factor of 2.33 trips/1,000 square feet to <br />determine the total number of trips generated (3,169). Of these trips, 50% (1,585) will be inbound, <br />and 50% will be outbound. Of the inbound trips, 60% or 951 will be northbound. <br />Development on a site as large a; the subject site would likely have severai entrance/exit points. A <br />trip distribution model indicates that Indian River Boulevard would receive 50% of the trips <br />generated. Therefore, rather than assign all trips to one road, only 50%, or 476, of the 951 inbound - <br />northbound trips were assigned to Indian River Boulevard. <br />Using a modified gravity model and a hand assignment, the trips generated by the proposed use were <br />then assigned to impacted roads on the network. Capacities for all roadway segments in the county <br />are updated annually. Available capacity is the total capacity less existing and committed (vested) <br />traffic volumes; this is updated daily based upon vesting associated with project approvals. <br />The roadway segment that would be most impacted by development on the subject property is Indian <br />River Boulevard, from Vero Beach city limits to 53' Street. The traffic capacity for that segment <br />of Indian River Boulevard is 1,890 trips, while the Total Segment Demand (existing traffic volume <br />+ vested traffic volume) is 679 trips. The additional 476 trips associated- with the most intense us <br />allowed under the proposed zoning district would increase the total trips for that segment of Indian <br />River Boulevard to approximately 1,155, less than its capacity at LOS "D" (1,890). <br />Based on the above analysis, staff determined that Indian River Boulevard and all other impacted <br />roads can accommodate the additional trips without decreasing their existing levels of service. <br />July 13, 1999 <br />14 <br />