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BACKGROUND The City of Dublin completed a Project Report and Environmental Documents for improvements to the I- 580 /Foothill Road San Ramon Road interchange in 2002. The improvements were designed to provide increased capacity and improve operations and safety. Required documentation for a Categorical Exemption for CEQA compliance and Categorical Exclusion for NEPA clearance were completed at that time. The City of Dublin began work on the north side interchange improvements in 2003. At that time the City of Pleasanton deferred the construction of improvements on the south side of the interchange. Earlier this year the City worked with Fehr and Peers Associates to perform an updated traffic study of the area. The study completed travel demand forecasts and Level -of- Service (LOS) analysis at surrounding intersections. The study included analysis of the original improvements identified in the 2002 Project Report as well as newer designs that account for the bicycle and pedestrian travel in the area. Staff has identified a preferred preliminary design and alignment that is similar to the original design but includes design elements that significantly improve vehicle, bicycle and pedestrian circulation throughout the project limits. As a result of this analysis, staff recommends initiation of the project design and construction. DISCUSSION The southern half of the I- 580 /Foothill Road interchange has a short weaving section between the existing loop ramps, limiting interchange capacity. Improvements identified in the updated traffic study will improve intersection operations by creating a design that is more suitable for the large volume turning movements present at this location. Currently, traffic entering Pleasanton from i1 _F R caw so Dom c airn R eastbound 1 -580 merges with southbound Foothill Road traffic just 350 feet north of o r rwoa>tsF.od�ew the Foothill Road/ Canyon Way/ Dublin Canyon Road intersection. This intersection provides direct access to the Stoneridge Mall Shopping Center, Safeway Corporate Headquarters, the future West Dublin BART station and a myriad of other I land uses. Vehicles from 1 -580 eastbound must weave across three lanes of traffic to `v access the left turn lanes leading to these locations (see aerial photo to the right). This movement is a contributing factor to the high collision rate at this intersection. In addition to vehicular traffic, the Foothill Road corridor attracts large numbers of bicyclists and pedestrians traveling to destinations surrounding the mall as well as other business and recreational attractions in the surrounding areas. The City has received frequent resident requests for improved bicycle and pedestrian circulation in the area. Page 2 of 3