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Indian River County I Impact Fee Update Study <br /> Demand Component <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 County, 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 discount factor is used to reduce the VMT that the <br /> impact fee charges for each land use. <br /> Table B-1 <br /> Interstate/Toll Facility Discount Factor <br /> Roadway <br /> (2035) <br /> 1-95&Turnpike (SR 19) 838,313 17.3% <br /> Other Roads 4,005,935 82.7% <br /> Total (All Roads) 4,844,247 100.0•% <br /> Total(interstate/Toll Roads) 838,313 17.3% <br /> Source:Greater Treasure Coast Regional Planning Model v3.4 <br /> Single Family Residential Trip Generation Rate Tiering <br /> As part of this study, an update to 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 /> 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. Indian River County <br /> June 2014 B-1 Impact Fee Update Study <br /> 2-03 <br />