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122 <br /> Technical Memorandum #1: Inventory of Current <br /> Organizational Direction and Service Delivery <br /> difficult for them to go outside the home alone for activities such as shopping <br /> or visiting a doctor's office. Often, transit service is their only option to reach <br /> critical destinations. <br /> • Below-Poverty Population (BP) - The number of individuals who have lived <br /> below the poverty level in the past 12 months. This group may not have the <br /> economic means to purchase or maintain a personal automobile. <br /> In addition to the five transit-dependent populations, data on the Population <br /> Density (PD) for each block group was also collected. Population density helps <br /> determine the type of transit service that may be most effective in a given area (i.e., <br /> frequent fixed-route service is more feasible in a high density area, whereas demand- <br /> response or scheduled services may be more practical in a low density area). <br /> Each block group in Orange County was assigned a score in the five transit- <br /> dependent categories,based on whether it was above or below the County average, and <br /> also for population density based on thresholds related to different types of transit <br /> service. The following formula then used the individual scores to calculate the overall <br /> TDI score per block group in Orange County: <br /> TDI = PDx [NV + E + Y + D + BP] <br /> Scores ranged from 0 to 100,with higher TDI scores indicating areas with a larger <br /> number of transit-dependent persons and a higher population density. The TDI score <br /> for each block group was compared to the average score for the County and then <br /> designated as one of five categories for relative transit need: "very high," "high;' <br /> "moderate," "low," or"very low." Where service gaps exist, this study will target areas <br /> with moderate to very high relative transit needs in developing recommendations to <br /> improve transit services. <br /> Transit Dependence Index Percentage (TDIP):Methodology <br /> The TDIP was used to determine higher relative transit needs that exist outside <br /> of the County's high density areas. This analysis was important since OPT primarily <br /> serves County residents that live outside of Chapel Hill and Carrboro, which are more <br /> urban and have the highest population densities within the County. The TDIP was <br /> similar to the TDI in data composition and function. However, the TDIP measured the <br /> degree of vulnerability for transportation needs, or the percentage of vulnerable persons <br /> United States Census data is used to calculate ten-year,percent change population shifts per block group, <br /> with this total population percent change being factored to the 2000 Census data for persons with <br /> disabilities to determine current estimates of persons with disabilities. <br /> OPT/CHT CTSP KFH <br /> and Consolidation Plan 1-11 <br />