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Expected Forecasls <br /> <br /> Interchange Analysis <br /> <br /> The 2010 expected network includes. changes to several freeway interchanges. <br /> Figure 5-7 shows the interchange configurations for existing and 2010 conditions. The <br /> following three new interchanges will be added to the network: <br /> <br /> · 1-580/Shaeffer Ranch Road <br /> · 1-580/Isabel (Route 84) <br /> · 1-680/West Las Positas <br /> <br /> The following 10 interchanges will be recont~gured or expanded: <br /> <br /> · 1-5 80/Foothi]l. Conversion from full cloverleaf to partial cloverleaf design. <br /> · 1-580/I-680. Addition of a southbound-to-eastbeund flyover ramp, addition of hook <br /> ramps to Dublin. <br /> · 1-580/Fallon. Widening of overpass to six lanes. Conversion to partial cloverleaf <br /> design. <br /> · 1-580/Portola. Removal of the ramps, will become just an overcrossing. <br /> · 1-580/North Livemore. Conversion from diamond to partial cloverleaf design, <br /> widening of overcrossing. <br /> · 1-580/First Street. Widening of overcrossing. <br /> · 1-580/Vasco. Widening of overcrossing, reconstruction of ramps to a partial <br /> cloverleaf design. <br /> · 1-580/Greenville. Conversion from hook ramps to partial cloverleaf design. <br /> · 1-680/Sycamore Valley. Elimination of the northbound-to-westbound off-loop. <br /> · 1-680/Alcosta. Addition of hook ramps to San Ramon Valley Boulevard, removal of <br /> southbound off-r~mp. <br /> · 1-680/Berual. Conversion to standard partial cloverleaf design. <br /> <br /> Tables 5-5 through 5-8 show the 2010 expected volume on the overcrossing and ramps <br /> at each interchange for the PM peak hour. The tables also show the number of lanes <br /> required to accommodate the expected volume. In all cases, the existing or planned <br /> interchange configuration will be adequate. <br /> <br />Barton-Aschman Associates, Inc. 92 <br /> <br /> <br />