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BACKGROUND The Alameda County Congestion Management (ACCMA) initiated the Study in 2004 to evaluate regional traffic improvements in the area bounded by I-580, I-680 and State Route 84. To assure appropriate local involvement, ACCMA facilitated establishment of the PAC, which agreed that the purpose of the Study is "to develop, by consensus, (emphasis added) a long range transportation plan for improvements on I-580, I-680 and Route 84 that benefit Tri-Valley. The PAC's recommended project sequencing and implementation strategy focuses on traffic improvements that will • Provide improvements to relieve congestion • Be cost effective • Be consistent with the transportation needs in the area. The base roadway network in the Study assumed the completion of all roadways included in the General Plans of the participating cities, with the exception of the Stoneridge Drive extension and the West Los Positas interchange. It also included: • Anew eastbound HOV lane on I-580 from Santa Rita Road to Greenville Road; • The widening of State Route 84 through Pigeon Pass to include truck climbing lanes; • The widening of State Route 84 from Ruby Hill Drive East to Stanley Boulevard to four lanes; • The widening of State Route 84 from Stanley Boulevard to I-580 to six lanes • Phase I of the new Isabel interchange at I-580; • I-580 on-ramp metering, both eastbound and westbound, through all three cities. The Study identified 13 regional traffic improvement projects which were placed in two implementation schedules. The only difference between the two implementation schedules, labeled Hybrid 1 and Hybrid 1A, is that Hybrid 1A includes the State Route 84 widening project from Pigeon Pass to I-680 including interchange and auxiliary lane improvements at I-680 and State Route 84. A complete list of the projects shown on Hybrid 1 and Hybrid 1A is attached to this report. DISCUSSION The Tri-Valley Triangle Study PAC met on March 26 to discuss the Study results and to develop a consensus recommendation that could be forwarded to the ACCMA. The majority of the members of the PAC supported the Hybrid 1 alternative, with the City of Pleasanton dissenting. Hybrid 1 did not include the State Route 84 improvements between Pigeon Pass and I-680. It is unclear to staff why Hybrid 1A was not supported, based on the traffic analysis which stated that Hybrid 1A provided the most significant improvement to regional traffic. Based on the PAC's recommendation, the Study is being forwarded to the ACCMA for adoption. Staff has concerns with the final recommendation. The purpose of the Study, as adopted by the PAC, stated that a plan would be developed by "consensus." Instead, the plan being recommended was selected by majority vote. In response, staff Page 2 of 3