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Recommended Improvement Plan <br /> <br /> 2. Route 84. Four lanes on Vallecitos Road, six lanes on Isabel Avenue, including <br /> interchange improvement at 1-580Nallecitos and a new interchange at <br /> 1-580/Isabel. <br /> <br /> 3. 1-680 Auxiliary Lanes. From Diablo Road to Bollinger Canyon Road. <br /> <br /> 4. BART Extension. From Castro Valley to East Dublin, including two stations in the <br /> Tri-Valley. <br /> <br /> 5. 1-580 HOVLanes. From Tassajara Road to North Livermore Avenue. <br /> <br /> 6. 1-680 HOV Lanes. From Route 84 to top of Sunol Grade. <br /> <br /> 7. Ramp Metering. Add ramp metering with HOV bypass to all freeway interchanges <br /> in the Tri-Valley. <br /> <br /> 8. 1-680/Alcosta Interchange. Capacity improvements including replacement of <br /> southbound off-ramp with hook ramp. <br /> <br /> 9. 1-580 / Foothill Interchange. Conversion to partial cloverleaf design. <br /> <br /> 10. Crow Canyon Road Safety Improvements. This project consists of realigning the <br /> roadway, construction of shoulders and improving sight distance, all aimed at <br /> improving traffic flow and safety on Crow Canyon Road between Bollinger Canyon <br /> Road and MM 4.45 (located one mile north of Norris Canyon Road). <br /> <br /> 11. Vasco Road Safety Improvements. This' project consists of the realignment of Vasco <br /> Road from the new Vasco Road to the Livermore City limit, without increasing the <br /> capacity of the gateway. This is consistent with the standards used in the Vasco <br /> Road relocation project by the Contra Costa Water District in conjunction with the <br /> Los Vaqueros reservoir project. <br /> <br /> The following three projects are also included in the transportation plan but are <br /> preliminarily considered by the TVTC to be of lower priority for the 2010 planning <br /> horizon. These projects are considered important to the future of transportation in the <br /> Tri-Valley but are not needed to meet the Transportation Service Objectives through <br /> 2010. <br /> <br /> 1. 1-580 HOV Lanes. Completion of the HOV project on 1-580 from 'Livermore Avenue <br /> to the Alnmeda County border. <br /> <br /> 2. 1-680 HOV Lanes. Completion of the 1-680 HOV Lane project from 1-580 to <br /> Route 84. This would create a system of continuous HOV lanes on 1-680 through <br /> the Tri-Valley. <br /> <br /> 3. 1-580/1-680 Interchange. Construction of the northbound to westbound flyover <br /> ramp. This improvement has been identified by Caltrans as the next step in <br /> improving the 1-580/I-680 interchange. This second flyover ramp would eliminate <br /> all existing weaving sections. <br /> <br />Barton-Aschman Associates, Inc. 141 <br /> <br /> <br />