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for this measure. <br />Table 6: Hours of Service Level of Service Criteria <br />LOS <br />Hours per Day <br />Description <br />A <br />19-24 <br />Night or "owl" service provided <br />B <br />17-18 <br />Late evening service provided <br />C <br />14-16 <br />Early evening service provided <br />D <br />12-13 <br />Daytime service provided <br />E <br />4-11 <br />Peak hour service or limited midday <br />service <br />F <br />0-3 <br />Very limited or no service <br />All IRT GoLine routes operate on a 10 -hour service day between the hours of 8 AM and <br />6 PM, which is equivalent to an Hours of Service LOS "E". <br />C. SERVICE COVERAGE LOS <br />The service area coverage measure is the percent of a transit -supportive area that is <br />served in the study area. A transit -supportive area (TSA) is an area with a minimum <br />population density or a minimum employment density to support hourly transit service. <br />The area must have either a population density of three or more dwelling units per gross <br />acre, or four or more jobs per gross acre, and be within walking distance to transit <br />service. Walking distance is generally considered as a '/4 -mile radius of a bus stop. The <br />TSA can be any defined geographic area, such as a quarter section, census block or <br />tract, or traffic analysis zone. This analysis utilized TAZs as the geographic area and <br />acres as the unit of measurement. Table 7 identifies the service level thresholds for the <br />service coverage area measure, while Table 8 presents the service area coverage LOS <br />for bus service at the Activity Centers as well as Countywide LOS. Figure 1 (on Page 4) <br />and Figure 2 illustrate the existing IRT service area (defined by 1/4 -mile buffer) and the <br />transit supportive areas in IRC. <br />Title VI Program (2017 Update) Page 30 <br />P139 <br />