COM 0726.000 2010-2012 - Laserfiche WebLink

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3.2 AVERAGE DAILY TRAFFIC Twenty-four hour traffic volume counts can be used to show when the peak hours (a.m., p.m., and midday) are occurring, when traffic volumes are heaviest, when traffic volume are lightest, and the trends and changes due to time of day, time of year, and location. In an effort to get a representation of the traffic on the island, two analysis techniques were used. The analysis methods included: • ADT: Average daily traffic (ADT) data at three different locations on the island were evaluated and • Trip generation: Trip ends were calculated based on the total number of single-family detached dwellings in Hawaii County and a trip end rate from the 7th Edition of the Trip Generation manual. Several assumptions were made while performing the traffic volume evaluation. The assumptions included: • Three traffic count locations for the ADT analysis were selected to give a reasonable representation of the traffic in Hawaii County; • Dusk to dawn hours were considered to be from 7:00 p.m. to 6:00 a.m.; • The number of single-family detached dwellings in Hawaii County provided by the County of Hawaii Real Property Tax Office; • A trip generation rate of 9.57 trips/dwelling/day; and • The percent of dusk to dawn traffic for trip generation analysis taken from the percent of dusk to dawn traffic in the ADT analysis. Figures 3.1, 3.2, and 3.3 illustrate the ADT at three locations in Hawaii County including volumes that occur in the dusk to dawn period from 7:00 p.m. to 6:00 a.m. Figure 3.4 is an illustration of the average values of the ADT over the three locations. Figure 3-5 illustrates the ADT in Hawaii County using a trip generation estimate. Figure 3-6 illustrates the dusk to dawn ADT in Hawaii County using a trip generation estimate. 6