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TIi-Valley Transportation Plqn/Adion Plan Update . 1-580 West Eight lanes . 1-580 East (Allamont Pass) Eight lanes plus HOV lanes . Crow Canyon Road (10 Caslro Valley) Two lanes with safety improvements . Vasco Road Two lanes with safety improvements Any departure from these assumptions would require amending the Plan. In response to the issues raised by the gateway approach, the Contra Costa Transportation Authority have established a gateway constraint methodology as pan of its Technical Pro- cedures. Current gateways are established by two factors: geographic constraints and financial con- straints. To some degree, the geographic constraints can be overcome through significant capital investments in new highway projects. However, the Tri-Valley Transportation Plan is based upon the assumption that significant capacity enhancements to the gateways serv- ing Tri-Valley are financially infeasible. The policy of the TVTC is to work closely with neighboring jurisdictions, Congestion management Agencies, Caltrans, and MTC to resolve capacity problems at the gateways and as needed through the partnership activities and to subsequently adjust our Transportation Plan should funding of mutually acceptable facili- ties become possible. Corridor Management Congestion Strategies A number of alternative strategies to adding new lanes or building new roads are available for addressing congestion. These strategIes focus on improving the efficiency of traffic flow on roads, and thereby increasing the number of vehicles or people that can move through that corridor. The range of potential strategies is broad. They can include the addition of auxiliary lanes to freeways, incident management programs such as the Freeway ServIce Patrol, changeable message signs that provide infor- mation to travelers on travel alternatives, ramp metering, and support for travel alterna- tives such as parkaand-ride lots and HOV bypass lanes at freeway ramps. In as sense, the gateway constraint concept is a strategy for managing the main traye! corridors within the Tri-Valley. Caltrans, with support from MTC, is in the process of implementing Traffic Operations Systems (TOS) along freeway corridors within the Bay Area. These systems will provide information to travelers on accidents and other delays on freeways, alternative routes to avoid these delays, and other information to encourage traveler decisions that would im- prove efficient roadway operations. Page 16 18 April 2000