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• <br />Indian River County I Impact Fee Update Study <br />household income levels. In addition, the 2011 AHS database was used to compare median <br />annual family/household incomes with housing unit size. It is important to recognize that <br />the use of the income variable in each of these databases is completed simply to provide a <br />convenient linking mechanism between household VMT from the NHTS and housing unit <br />size from the AHS. <br />Table B-2 <br />Calculated Single Family Trip Characteristics <br />Calculated Values <br />Excluding Tiering <br />Single Family (Detached) <br />Trip Rate <br />7.81 <br />Assessable <br />_ Trip Length <br />/6:62 <br />Daily VMT; Ratio to <br />Mean <br />51.70 <br />1.00 <br />Source: FL Studies for LUC 210, shown later in this <br />"appendix <br />y, <br />The results of the NHTS and AHS analyses are included in Tables B-3 and -,.B-4. First, the data <br />shown in Table B-3 indicates that the average income in=the U.S. for "families/households <br />living in housing units between 1,500 and 2,499. square= feet in size ($62,563) is slightly <br />lower than the overall average income for the U.S: -($62,831). Then, in Table B-4, annual <br />average household VMT was calculated from -the NHTS database for a number of different <br />income levels and raged related to the.resulting-AHS income data in Table B-3. <br />TableyB-3 <br />Calculated‘Single Family Trip Characteristics <br />2011 AHS Average Income 1 <br />Data by Housing Size 1 <br />Annual <br />Income(1) <br />Lesthan1,500 sf'-' =. '; <br />Daily VMT <br />$42,156 <br />1,500 id 2,499 sf <br />Average of $42,156 <br />$62,563 <br />2,500 sf or more <br />52.72 <br />$79,443 <br />Average of All Houses <br />Total (All Homes) <br />$62,831 <br />Source: 2011 American Household Survey <br />i <br />Table B-4 <br />`NHTS VMT Annual VMT by Income Category <br />2009 NHTS Travel Data by <br />Annual HH Income <br />Annual I <br />VMT/HH <br />— <br />Days <br />Daily VMT <br />Ratio to <br />Mean <br />Normalized <br />to 0.995 <br />Average of $42,156 <br />19,241 <br />365 <br />52.72 <br />0.796 <br />0.800 <br />Total (All Homes) <br />24,181 <br />365 <br />66.25 <br />1.000 <br />Average of $62,563 <br />24,053 <br />365 <br />65.90 <br />0.995 <br />1.000 <br />Average of $79,443 <br />28,349 <br />365 <br />77.67 <br />1.172 <br />1.178 <br />Source: 2009 National Household Travel Survey Database, Federal Highway Administration <br />Tindale -Oliver & Associates, Inc. <br />January 2014 <br />Indian River County <br />B-2 Impact Fee Update Study <br />