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• <br />• <br />Indian River County 1 Impact Fee Update Study <br />To calculate a corresponding trip rate for the new tiers it was necessary to rely on <br />comparative ratios. As an example, consider the $42,156 annual income category. First, it <br />was determined that the average annual household VMT for this income level is 19,241 <br />miles. This figure was then compared to the overall average annual VMT per household in <br />the U.S. and normalized to the average of the $62,563 (24,053 miles) category to derive a <br />ratio of 0.800. Next, the normalized ratio was applied to the daily VMT for the average <br />single family housing unit size (Less than 1,500 sf) to generate a daily VMT of 41.36 for the <br />new tier, as shown in Table B-5. This daily VMT figure was then divided by the proposed <br />assessable trip length of 6.62 miles to obtain a typical trip rate of 6.25 trips per day. <br />Table B-5 s ` <br />Trip Generation Rate by Single,Family Land Use,Tier <br />Estimation of Trip Rate by 1Assessable <br />Tier <br />Single Family (Detached) <br />Trip Rate�ll <br />11 <br />Trip Length(2) <br />Daily <br />VMT(3) <br />Ratio to <br />Mean(4) <br />Less than 1,500 sf �'° <br />�:�;�, 6.25 <br />�� --; 6:62 <br />41.36 <br />-:'..0.800 <br />1,500 to 2,499 sf <br />..'�-.7.81 <br />�`_c'6.62 <br />51.70 <br />1.000 <br />2,500 sf or larger <br />`<> "-9.20, <br />`-6:62 <br />60.90 <br />1.178 <br />(1) Daily VMT (Item 3) divided by assessable trip length (Item'2) for each tiered single <br />family land use category <br />(2) Source. Table B-2 <br />Ratio to the mean (Item 4)divided by,th'e total "daily VMT for the 1,500 to 2,499 sf tier <br />for each'tiered,sf single family land use category <br />(4) Source: Table B-4, <br />(3) <br />Table -,B26 illustrates the impact that the incorporation of the trip generation rate tiers for <br />the single,family (detached) land use:have on the County's calculated impact fee schedule. <br />Table B-6 <br />:Net Impact Fee by Single Family Land Use Tier <br />Impact of Tiering on Fee(1j <br />j <br />Schedule, <br />Single Family (Detached) <br />Assessable <br />Trip Rate <br />Length , <br />Daily VMT <br />Net Fee(2) <br />Less than 1,500 sf <br />6.25 <br />6.62 <br />41.36 <br />$3,491 <br />1,500 to 2,499 sf <br />7.81 <br />6.62 <br />51.70 <br />$4,354 <br />2,500 sf or larger <br />9.20 <br />6.62 <br />60.90 <br />$5,129 <br />(1) Source: Table B-5, Item 1 <br />(2) Source: Appendix E, Table E-1 <br />Tindale -Oliver & Associates, Inc. <br />January 2014 <br />Indian River County <br />B-3 Impact Fee Update Study <br />