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destined for, each traffic analysis zone (TAZ). These <br />corridor TAZ trip ends were used in conjunction with the <br />total TAZ trip ends (arterial highways plus corridor) to <br />compute the percentage of trip ends by TAZ which use the <br />corridor. The resulting percentages were posted on TAZ <br />maps in 2% increments (Exhibits III and IV). <br />The influence area for each of the corridors is quite <br />pronounced at the 4% and greater trip use level as shown <br />on the exhibits. The pattern of corridor usage becomes <br />erratic below the 4% level. <br />The determination of the AOB for each of the <br />transportation corridors was based primarily on the above <br />corridor influence areas. However, the following <br />additional criteria were used to supplement the percent <br />of corridor use data to analyze relative benefits: <br />1. Corridor trip ends exceed 1.75 trip ends per gross <br />acre of the TAZ. <br />2. Total corridor trip ends per TAZ exceed 2,000. <br />3. Trip end growth within each TAZ exceeds 45 %. <br />4. Perceived direct and indirect benefits to the <br />transportation system. <br />Identifiable physical and planned features closely <br />approximating the pattern of corridor usage were used to <br />describe the boundaries of the benefit areas. <br />Within each Area of Benefit, some lands were judged to <br />receive more benefit than others from the construction of <br />the corridors. Developments which create relatively high <br />demands for use of the corridors were placed in a <br />different fee zone within the Area of Benefit than other <br />developments with less direct use. The boundaries <br />between the fee zones were determined utilizing the TAZ <br />data on Exhibits III and IV. Traffic analysis zones <br />where the percentage of corridor trip ends equals or <br />exceeds 8% were defined as Zone A. Traffic analysis <br />zones with less than 8% use were defined as Zone B. Zone <br />A and B are depicted on Exhibit I. <br />VII. DESCRIPTION OF AREA OF BENEFIT (AOB) <br />The AOB's for the San Joaquin Hills and the combined <br />Foothill /Eastern Corridors include both incorporated and <br />unincorporated territory and generally encompass the <br />southeasterly half of Orange County as illustrated on <br />-14- <br />