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<br /> " (~( fa; <br /> . In 1970 an average passenger vehicle in the Twin Cities region had 1.50 occupants, <br /> . in 1990 this value reduced to 1.29 occupants per vehicle. <br /> The TBI defines a "trip" as a ~one-way trip made by (family) members 5 years of age or older." <br /> From the above statistics, it can be computed that on a daily basis in 1990, an average Twin <br /> Cities area household made: <br /> 10.1 person-trips/household .;- 1.29 persons/vehicle = 7.8 vehicle-trips/household, <br /> This 7,8 trips/household figure is 30 percent higher than the lower range of SlX <br /> trips/household used to develop the criteria in the SUP, <br /> More specific traffic generation data for the Metro area is presented in the "Home Interview <br /> Survey" [5], one of a series of technical reports developed for the TBI. The Home Interview <br /> Survey indicated that household trip rates increase with household income. Table 4 presents <br /> trip generation by household income, <br /> Table 4 - Trip Generation By Household Income <br /> Income Trips Per Household <br /> Less than S7,500 3.6 <br /> S7,500 to S15,000 4.5 <br /> $15,001 to $25,000 6.9 <br /> S25,001 to $35,000 9.1 <br /> . $35,001 to $45,000 11.5 <br /> . <br /> $45,001 to $55,000 13.1 <br /> $55,001 to S75,OOO 13.6 <br /> Over $75,000 14.0 <br /> Source: Reference [3]. Table 26. <br /> According to a recent survey [6]. the median household income in Arden Hills is <br /> approximately $68,500, This household income corresponds to 13.6 person-trips per <br /> household (Table 4). From these statistics. it can be computed that on a daily basis, an <br /> average Arden Hills household makes approximately: <br /> 13.6 person-trips/household .;- 1.29 persons/vehicle = 10.5 vehicle-trips/household. <br /> This 10.5 trips/household figure is 75 percent higher than the lower range of six <br /> trips/household used to develop the criteria in the SUP. <br /> Another alternative source for traffic generation information is the commonly used Institute <br /> of Transportation Engineers, "Trip Generation" [7]. In "Trip Generation," ITE presents trip <br /> generation relationships for various land use categories based on actual traffic count data. <br /> ITE defines "trip" as "a single or one-direction vehicle movement with either the origin or the <br /> . destination inside a study site." The land use category nearest to "low to medium density <br /> residential" in "Trip Generation" would appear to be "Single Family Detached Housing." <br /> mjw:mjw/raf:13444rpt.OO1 '-6 STANLEY CONSULTANTS <br />