Agmt21 Environmental Science Associates

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Proposed Work Program June 2021 City of Redwood City / Gatekeeper Projects Subsequent EIR 10 environmental science associates (with the understanding that these represent COVID-level traffic conditions), as well as, verification of pedestrian, bicycle, and transit facilities. Existing Conditions. F&P assumes that F&P will conduct an existing conditions analysis to use as a baseline for the Gatekeeper projects. However, only the relevant information will be reported for each project based on the study areas described above. F&P will calculate the existing a.m. and p.m. peak-hour levels of service for the study intersections and freeway segments using the traffic counts and site observations collected under the Data Collection task, above. F&P proposes to use the Synchro analysis platform for intersection analysis, which is consistent with City of Redwood City practices. F&P will conduct the freeway segment and ramp analysis using methodologies that are consistent with other Redwood City recent studies for the locations listed above. In addition to the traffic analysis, F&P will qualitatively describe pedestrian, bicycle, and transit facilities in the study area, with an emphasis on access to and within the downtown. Existing Plus Project Conditions. F&P will add the project-generated vehicle trips developed to the existing conditions traffic volumes developed to create Existing Plus Project Conditions traffic volumes. F&P will complete an impact assessment by comparing the results of Existing Plus Project Conditions to the Existing (no Project) Conditions for the study locations. Identification of adverse effects will be determined by comparing the results to the City’s significance criteria presented in the TAM. F&P will identify mitigation improvements for adverse effects and discuss feasibility and implementation factors with City Staff for comment and concurrence prior to completing the study. Cumulative Conditions. F&P will review recent studies conducted within the study area, including South Main Street and Harbor View projects, to develop a Cumulative No Project turning movement forecast. We will use the same C/CAG model runs from the South Main Street and Harbor View projects to develop AM and PM peak hour freeway segment and ramp forecasts. F&P will complete an adverse effects assessment by comparing the results of Cumulative Plus Project Conditions to the Cumulative No Project Conditions. Identification of impacts will be determined by comparing the results to the City’s significance criteria. F&P will identify mitigation measures for significant impacts and discuss feasibility and implementation factors with City Staff for comment and concurrence prior to completing the study. Rail Crossings. The existing at-grade crossings are located at Whipple Road, Brewster Avenue, Broadway, Maple Street, Main Street, and Chestnut Street. As part of this task, F&P will develop a VISSIM model to evaluate operations at the six existing at-grade rail crossings and the intersections directly east and west of the crossings, which include the eleven locations (see Appendix B for the list of locations). The City is currently considering several grade separation alternatives, including what is known as Alternative 1 (grade separation at all six locations) and Alternative 3 (grade separation only at Whipple Avenue and Brewster Avenue, with the Broadway crossing closed to vehicular access). F&P will develop a VISSIM model under Cumulative No Build, Cumulative plus Alternative 1, and Cumulative plus Alternative 3 scenarios. The Cumulative No Build scenario will include both the Transit District and Gatekeeper REV: 06-23-21 MI ATTY/AGR.2021.150/Environmental Sciences Associates (Gatekeeper Projects) (Page 20 of 58)