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The City's General Plan requires site-specific traffic studies for all major developments which have the potential to exceed Level of Service (LOS) D at major intersections and requires developers to implement the mitigation measures identified in these studies to maintain LOS D or better. Exceptions are made for the Downtown and Gateway Intersections5 where the LOS D or better standard may be exceeded. A traffic study was prepared by Kimley-Horn and Associates, Inc., acting as the City's traffic consultant, to analyze the traffic and circulation for this project. The traffic study documents the traffic projected to result from the housing projects included in the 2012 Housing Element (including the project), the recently constructed Workday office building, and the approved (and under construction) 10x Genomics building and compares them to the General Plan LOS D standard. Details of the methodology and the analysis can be found in Attachment 4. The conclusion of the traffic study indicated the project is consistent with the residential development studied in the 2012 Housing Element, where 400 residential units were assumed on the project site. Since the project is proposing only 360 of the 400 residential units analyzed for the project site at that time, it was determined the project would not result in any new road capacity issues beyond those previously identified in Housing Element and all impacts would be less than significant. The City Traffic Engineer has reviewed the project and determined that no additional traffic analysis would be required. The Housing Element Mitigation Measures would be applied to the project and would be implemented through conditions of approval. Additionally, the project would be required to provide the design and installation of all required traffic signal/intersection modifications. Finally, the project has been conditioned to pay the applicable City and Tri-Valley Regional traffic impact fees, as well as local roadway noise pro-rata share costs, to help fund future improvements to local and regional roadways. Holiday Shopping Traffic While not analyzed in the project traffic study, the traffic study prepared for the 10x Genomics project across the street to the south noted that because the project is located near a regional shopping mall, there are periods in late November and December when traffic conditions would be different than described in the traffic study. Generally, vehicle trips increase during the PM commute hour for some traffic movements around retail centers beginning at Thanksgiving and peaking just before the late-December holidays. However, holiday season travel patterns occur for a relatively few numbers of days each year and are considered atypical. The traffic engineering profession generally discourages data collection during atypical periods because it is uneconomical to construct physical improvements to accommodate seasonal traffic increases. For this reason, as well as changing in-person retail patterns, the transportation infrastructure and land use impacts of new projects are commonly 5 Per the General Plan, consideration may be given to traffic improvements at Gateway Intersections when it is determined that such improvements are necessary and are consistent with maintaining visual character, landscaping, and pedestrian amenities. Page 33 of 41