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F, GOOK i00 FACE �A 4. Percentage of Project Trips on This Segment of Indian River Boulevard: 50 5. Formula for Determining Number of Peak Hour/Peak Season/Peak Direction Trips Generated on the Most Impacted Segment of the Roadway Network (Indian River Boulevard): Total Square Footage X P.M. Peak Hour Rate X Inbound P.M. Percentage X Inbound -Northbound Percentage X Percentage of Trips on Indian River Boulevard (1,360,000 X 2.33/1,000 X.5 X.6 X.5 = 476) 6. Traffic Capacity on this segment of Indian River Boulevard, at a Level of Service "D": 1,890 peak hour/peak season/peak direction trips 7. Total Segment Demand (existing volume + vested volume) on this segment of Indian River Boulevard: 679 peak hour/peak season/peak direction trips To determine the number of trips that would be generated by the most intense use of the subject property under the proposed zoning district, the maximum square footage allowed under the proposed zoning (1,360,000) was multiplied by ITE's factor of 2.33 trips/1,000 square feet to determine the total number of trips generated (3,169). Of these trips, 50% (1,585) will be inbound, and 50% will be outbound. Of the inbound trips, 60% or 951 will be northbound. Development on a site as large as the subject site would likely have several entrance/exit points. A trip distribution model indicates that Indian River Boulevard would receive 50% of the trips generated. Therefore, rather than assign all trips to one road, only 50%, or 476, of the 951 inbound - northbound trips were assigned to Indian River Boulevard. Using a modified gravity model and a hand assignment, the trips generated by the proposed use were then assigned to impacted roads on the network. Capacities for all roadway segments in the county are updated annually. 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 roadway segment that would be most impacted by development on the subject property is Indian River Boulevard, from Vero Beach city limits to 53'd Street. The traffic capacity for that segment of Indian River Boulevard is 1,890 trips, while the Total Segment Demand (existing traffic volume + vested traffic volume) is 679 trips. The additional 476 trips associated with the most intense us allowed under the proposed zoning district would increase the total trips for that segment of Indian River Boulevard to approximately 1,155, less than its capacity at LOS "D" (1,890). Based on the above analysis, staff determined that Indian River Boulevard and all other impacted roads can accommodate the additional trips without decreasing their existing levels of service. - Water A retail commercial use of 1,360,000 square feet on the subject property will have a water consumption rate of 408 Equivalent Residential units (ERU), or 102,000 gallons/day. This is based upon a level of service standard of 250 gallons/ERU/day. Water lines extend to the site from the North County Reverse Osmosis Plant which currently has a remaining capacity of approximately 2,400,000 gallons/day and therefore can accommodate the potable water demand associated with the proposed zoning district. - Wastewater The subject property is serviced by the Central Regional Wastewater Treatment Plant. Based upon the most intense use allowed under the proposed zoning district, development of the property will have a wastewater generation rate of approximately 408 Equivalent Residential Units (ERU), or 102,000 gallons/day. This is based upon the level of service standard of 250 gallons/ERU/day. The • JULY 279 1999 28 0 I