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Indian River County I Impact Fee Update Study <br /> Demand Component <br /> Travel Demand <br /> The amount of transportation system consumed by a unit of new land development is <br /> calculated using the following variables and is measured in terms of the vehicle miles of <br /> new travel a unit of development consumes on the existing road system. <br /> • Number of daily trips generated; <br /> • Average length of those trips; and <br /> • Proportion of travel that is new travel, rather than travel that is already traveling on <br /> the road system and is captured by new development. <br /> As part of this update, the trip characteristics variables were obtained primarily from two <br /> sources: (1) trip characteristics studies previously conducted throughout Florida by TOA <br /> (Florida Studies Database), and (2) the Institute of Transportation Engineers' (ITE) Trip <br /> Generation report (9th edition). <br /> The Florida Studies Database is included in Appendix B. This database was used to <br /> determine VMT, which is developed from trip length, percent new trips, and trip rate for <br /> most land uses in the fee schedule. The data in the trip characteristics database is based on <br /> actual land use studies and was collected throughout Florida using machine traffic counts <br /> and site specific land use origin-destination surveys. In addition, trip generation data from <br /> the ITE 9th Edition Trip Generation report was used. In instances where trip generation was <br /> available from the ITE Trip Generation report and the Florida Studies Database, a blended <br /> average calculation was used to increase the sample size. <br /> Interstate and Toll Facility Discount Factor <br /> This variable is used to recognize that improvements to Interstate highways are funded by <br /> the State using earmarked and Federal funds, while toll facility improvements are funded <br /> with toll revenues. Typically, impact fees are not used to pay for these improvements, and <br /> the portion of new development's travel occurring on the interstate/toll facility system <br /> usually is eliminated from the total travel for each land use. <br /> To calculate the interstate and toll (I/T) facility discount factor, the loaded highway network <br /> file was generated for the Greater Treasure Coast Regional Planning Model v3.4 <br /> (GTCRPM). A select link analysis was run for all traffic analysis zones located within Indian <br /> Tindale-Oliver&Associates, Inc. Indian River County <br /> June 2014 107 Impact Fee Update Study <br /> ►c}2 <br />