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Executive Summary <br /> <br /> · The transit mode share will increase slightly from existing conditions. <br /> · Average vehicle occupancy will not change appreciably from existing conditions. <br /> <br /> The Tri-Va!ley Transportation Plan <br /> <br /> The model results of the "expected" land use and "expected" transportation system were <br /> the basis for the Tri-Valley Transportation Plan. The Plan is not projected to relieve all <br />-- traffic congestion in Tri-Valiey. Levels of service on some arterial segments and on <br /> freeway segments at the gateways will remain below E. <br /> <br />_ Based on the results of the alternatives testing, the TAC and the TVTC decided to focus <br /> the ultimate improvement plan on the arterial corridors within Tri-Valley rather than the <br /> Tri-Valley gateways. The plan must address the primary question: What can we do to <br />_ achieve the best level of service within the Tri-Valley? <br /> <br /> Three contributing factors influence the ability to respond to this question. <br /> <br /> · Financial constraints. <br /> · Physical limitations within corridors. <br />-- · Development pattern. <br /> <br /> Financial resources for all projects are limited. The Measure C and Measure B sales tax <br />_ programs provide substantial funding for specific projects in Tri-Valley. Other projects <br /> must compete for the relatively small pot of public funds. Developer fees, which have an <br /> upper limit, could help supplement public funds. Future sales tax or gasoline tax initia- <br />__ tives may or may not be successful. <br /> <br /> Expansion of major corridors within Tri-Valley is limited due to existing development and <br />_ terrain. These limitations hinder the development of transportation corridors other than <br /> the existing 1-680 and 1-580 corridors. <br /> <br /> Development patterns within Tri-Valley have been geared toward relatively low housing <br /> and commercial densities. These patterns are expected to continue in the future. This <br /> development pattern is impossible to serve thoroughly with transit, given realistic funding <br /> expectations. <br /> <br /> The plan proposes no increases in gateway capacity for single-occupant vehicles. "Gate- <br /> ways" are the regional roads that connect the Tri-Valley to adjoining areas. This will help <br /> to meter traffic in and out of the area. The plan balances the internal transportation <br /> network with planned growth through the provision of several roadway and transit <br /> improvements.'Figure E-2 shows the translSortation plan network. <br /> <br />-- Barton-Aschman Associates, Inc. x <br /> <br /> <br />