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BACKGROUND In 2010 the City Council adopted the Stoneridge Drive Specific Plan Amendment and the Staples Ranch Policy Statement. The Specific Plan Amendment and the Policy Statement set forth conditions assuring the opening of Stoneridge Drive to through traffic in a predictable manner. The opening of Stoneridge Drive was separated into two phases: opening of Stoneridge Drive with a short two lane section over the Arroyo Mocho as Phase I. Phase II is the full four lane roadway design changing the two lane section over the Arroyo Mocho into a four lane section. Phase I was constructed and opened on November 1 , 2013. The travel lanes over the bridge were reduced to one lane in each direction, but the rest of the Stoneridge Drive extension were opened with its ultimate design of two lanes in each direction. Phase II provided the City Council discretion to open Stoneridge Drive from two to four lanes any time after November 1, 2015 and after holding a public meeting to discuss the implementation of Phase II. The two years with the single lane bridge was intended to provide an adequate evaluation time for both residents and staff to adjust to the new traffic circulation and have sufficient opportunity to collect travel pattern data. DISCUSSION While the extension of Stoneridge Drive and its eventual connection with Jack London Boulevard in Livermore was generally seen as regional benefit to the transportation network, the Stoneridge Drive community expressed concerns about the increase of traffic to the area. The 2010 traffic model conservatively estimated the maximum number of vehicles in any hour of the day to be 1,200 vehicles. The single lane design of the bridge was to provide a deterrent to vehicles in case the traffic model underestimated the volume on Stoneridge Drive. Traffic Volumes The single lane design limits capacity to 1,600 vehicles per hour. The traffic volumes presented below were obtained just east of the intersection of Stoneridge Drive and Trevor Parkway. The volumes indicate through vehicle movements from the bridge over the Arroyo Mocho. Page 2 of 4