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Indian River County 1 Impact Fee Update Study <br />• Demand Component <br />• <br />• <br />This appendix presents the detailed calculations for the demand component of the <br />transportation impact fee update. <br />Interstate and Toll Facility Discount Factor <br />Table B-1 presents the interstate and toll facility discount factor used in the calculation of <br />the transportation impact fee. This variable is based on data from the Greater Treasure <br />Coast regional travel demand model, specifically the 2035 projected vehicle miles of travel, <br />accounting for roadway improvements included in the 2035 Long Range Transportation <br />Plan. It should be noted that discount factor excludes external -to -external trips which <br />represent traffic that goes through Indian River Co nty, but does not necessarily stop in the <br />county. This traffic is excluded from the calculations since it does not come from <br />development within the county The I/T discounttfactor is<used to reduce the VMT that the <br />impact fee charges for each land use <br />erG. Table,B-1 <br />Interstate Toll FacilityDiscount Factor <br />Roadway <br />% VMT <br />_1 <br />17.3% <br />VMT <br />(2035) <br />838,313 <br />1195 & Turnpike <br />(SR 19) "p1n <br />•tether Roads. vet <br />4,005,935 <br />82.7% <br />l <br />Totah(=AILRoads) ,. <br />4,844,247 <br />100.0% <br />:Total (Interstate/ToIIRoads) <br />ti 838,313 <br />17 3% <br />Source: Gr a eTreasure Coa tRegional Planning Model v3.4 <br />Single FamikResidential Trip' Generation Rate Tiering <br />As part of this study; an updatedo the tiering of the assessed impact fee for the single family <br />residential (detached);.land_use to ensure equity by size of home, is included. To facilitate <br />... <br />this, an analysis was completed on the comparative relationship between housing size and <br />household travel behavior. This analysis utilized data from the 2009 National Household <br />Travel Survey (NHTS) and the 2011 American Housing Survey (AHS) to examine overall trip - <br />making characteristics of households in the United States. <br />Table B-2 presents the existing trip characteristics being utilized in the current adopted <br />impact fee schedule for the single family (detached) land use. The 2009 NHTS database was <br />used to assess average annual household vehicle miles of travel (VMT) for various annual <br />Tindale -Oliver & Associates, Inc. <br />January 2014 <br />Indian River County <br />B-1 Impact Fee Update Study <br />