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2) What would happen if we build Stoneridge Drive today? <br />The purpose of the General Plan model is a build-out model. They did not look at this at <br />all, as it was not their intention. Their model is to look at what happens at 2030 to see what <br />sort of roadway improvements are needed for those 2030 land uses at build-out <br />conditions. <br />He said under the City's 2007 Triangle Study they looked at what would happen if they <br />extended Stoneridge Drive today. It is a model that was used to look at regional <br />improvements and to determine which ones are best and in what order they should come <br />in. One of the main questions that came up was how much would be cut-through traffic if <br />we connected it today? What the Triangle model showed was that about 50% of the PM <br />traffic going eastbound would be cut-through traffic. There was not much change in the <br />AM. <br />There was also a question asked about what would that volume be? While staff took a lot <br />of time going over what the build-out model assumptions were, he explained that one of <br />the things they put in place was ramp metering at the EI Charro on-ramp, so the <br />eastbound traffic is limited to 600 vehicles in the peak hour. So, you could try to put 1,000 <br />vehicles on that road, but only 600 are going to get to the freeway. If drivers cannot access <br />the freeway in that hour, the model is not going to assign it there. The outcome indicates <br />+280 vehicles are local traffic eastbound and another 350 of the 600 would be cut-through <br />traffic. <br />Mr. Tassano said another question asked about what the comparative costs were if they <br />were to build Stoneridge Drive extension or build the improvements that would be <br />necessary if we do not build the extension. There is a lot of background information staff <br />needs to do to go and find the specifics of this question, such as a third southbound left- <br />turn lane at Santa Rita and Valley which would be about $80,000 to $100,000, but there is <br />more variance with others because they have not measured total widths, turn pocket <br />lengths, and widening of the bridge structure. <br />Regarding the traffic model, Council requested staff to review the Consensus Preferred <br />Plan, the Dispersed Growth Option and the Concentrated ResidentiallTransit Oriented <br />Development (TOD) Mixed Use Option. They modeled both with and without the <br />Stoneridge Drive extension and also looked at transit oriented development with a reduced <br />trip generation rate. They looked at overall traffic volumes throughout Pleasanton for each <br />land use, specific flow patterns resulting from the extension of Stoneridge Drive for each <br />land use, cut-through volumes at key locations, direct volume comparisons at key <br />locations and level of service and delay for each land use both with and without <br />Stoneridge Drive for every 100+ intersections. <br />The results generated five broad conclusions: 1) There is little difference in the traffic <br />volume and delay when comparing the three land uses with and without Stoneridge Drive; <br />2) There is little difference between the two types of transit oriented development whether <br />they looked at the further reduced trip generation rates or the full Institute of <br />Transportation Engineers (ITE) rates-the volumes are very similar; 3) The Stoneridge <br />Drive extension did result in the redistribution of traffic and it relieved some of the more <br />heavily traveled roadways; 4) At build-out the extension increases the number of vehicles <br />on Stoneridge Drive; and 5) Stoneridge Drive extension reduces peak hour volumes and <br />cut-through trips on various routes at General Plan build-out. <br />City Council Minutes 6 May 1, 2007 <br />