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approximately 12 grade- separate interchanges with <br />arterial highways as well as provisions for future <br />additional interchanges with arterial highways plus <br />provisions for future additional exclusive interchange <br />ramps for HOV lanes. Additional bridges may be required <br />as the corridors cross substantial canyons and water <br />courses. <br />The EASTERN TRANSPORTATION CORRIDOR is currently shown as <br />a set of alternative preferred alignments and included <br />in the Transportation Element of the Orange County <br />General Plan. The preferred alternatives will be studied <br />further as the environmental review process continues. <br />The FOOTHILL TRANSPORTATION CORRIDOR is an established <br />alignment between the Eastern Corridor and a point <br />northerly of Ortega Highway and a conceptual alignment <br />between that point and San Diego Freeway (I -5). As <br />depicted on Exhibit I, the Eastern Transportation <br />Corridor will intersect the Riverside Freeway (Route 91) <br />between Weir Canyon Road and Gypsum Canyon Road extending <br />southeasterly approximately 13 miles to a point southerly <br />of the Santa Ana Freeway (I -5) in the Cities of Tustin <br />and Irvine. The Foothill Transportation Corridor will <br />originate at the Eastern Corridor between Santiago <br />Canyon Road and Irvine Boulevard and extend southeasterly <br />approx. 32 miles to the San Diego Freeway (I -5) below San <br />Clemente in San Diego County. It is anticipated the <br />Eastern corridor will be a landscaped, grade separated <br />scenic corridor which includes approximately six general <br />purpose travel lanes and the Foothill Corridor, a <br />landscaped corridor which includes four to six general <br />purpose travel lanes with medians or other areas wide <br />enough to accommodate HOV /Special Transit requirements if <br />necessary. Access to the corridor will be limited to <br />grade - separated interchanges with arterial highways plus <br />provisions for future exclusive interchange ramps for HOV <br />lanes. <br />III. CORRIDOR PLANNING <br />The level of facility planned in this report will support <br />currently adopted land use plans of the County and Cities <br />surrounding the corridors. In the event the Cities and <br />County subsequently amend their existing General Plan <br />Land ilses Elements, particularly in areas serving the <br />Foothill and Eastern Corridors, those facilities may <br />require adjustments in lanes to accommodate that <br />growth. It is intended that the fee adopted under this <br />program will be reevaluated if an additional level <br />-7- <br />