AgdaPkt 2010-02-01 clsd and regular

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Saltworks Proposal- Transportation Group Summary Report (22 January 2010) 7A - ATTACHMENT NO.4 Page 21 . An upgraded two-lane Maple Street crossing of US 101 to provide improved access for autos and other modes including bicycles and pedestrians . A two-lane extension of Blomquist Street between Maple Street and Whipple Avenue (as proposed in the existing General Plan) Conceptual engineering studies are being prepared by DMB consultants for the new gateway intersections, grade separations, and overcrossings. These conceptual studies are being performed to document the physical feasibility of creating these new connections as well as establishing plan lines or construction footprints, which can be used to determine the need for right of way and potential property acquisitions. Fehr & Peers reviewed some of the conceptual designs for the US 101 overcrossing between Marsh Road and Woodside Road and for the Blomquist Street / Seaport Boulevard connection. The conceptual designs include both at-grade and grade separated designs. These conceptual designs for the US 101 overcrossings demonstrated that the connections are physically feasible between the Saltworks Perimeter Road and Broadway. For these conceptual studies, the connection alternatives between the Saltworks Perimeter Road to Broadway were located at either Douglas Street or Second Avenue. All the conceptual alignments would flyover both Bayshore Road and US 101. While it would be possible to design a single connection with sufficient capacity for the Saltworks traffic, it may be desirable to have two two- lane connections to better distribute the traffic. Based on the peak-hour traffic volumes from the trip generation and preliminary modeling, and Fehr & Peers' independent estimates that between 6,000 - 7,000 peak hour trips would be generated by the project, it appears that three, four-lane connections serving the development would provide sufficient vehicular capacity into the project site. Additional analysis would be needed to confirm that there is sufficient available capacity at the three existing US 101 interchanges to accommodate project traffic. The operation of the interchanges cannot be tested until a travel demand forecast model has been established for the project in order to account for the changes in travel patterns and provide estimates of the increase in traffic volumes at these locations. 4.1.1 Key Issues Based on the available data the following issues are unresolved. They are presented in order moving from south to north and no ranking or prioritization is implied by the presentation. Where a given issue requires further technical specifics from DMB to refine the Saltworks proposal in order to perform appropriate CEQA review, that fact is noted. 1. Marsh Road I Bayfront Expressway I Perimeter Road Connection - The intersection of Marsh Road / Bayfront Expressway is a State of California facility. The design of the connection may affect Haven Avenue and properties within an adjacent or applicable jurisdiction. There is the potential for property acquisition in order to make this connection, which could require approvals from multiple agencies. Discussions with these agencies should commence early in the process since the logistics of this connection could have an effect on other major connections in the project. 2. New US 101 Overcrossing - The new US 101 overcrossing would provide an optional means for traffic to move to and from the Saltworks projectwithout using the Woodside Road interchange. Regardless of the final alignment of a new US 101 overcrossing between Marsh and Woodside Roads, the connection or connections will require property acquisitions on both sides of US 101. In addition, all of the potential overcrossing alignments reviewed will likely impact existing buildings on one or both sides of the freeway. On the west side of US 101 - based on the possible alignments studied - there may be access restrictions to the properties immediately adjacent to the overcrossing landing. DMB would need to propose technical specifics for the new overcrossing connection in order to perform an appropriate CEQA analysis. 14