AgdaPkt 2017-09-11 Closed and Joint SA PFA

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TA. - Page 107 LSA ASSOCIATES, INC. ROCKETSHIP REDWOOD CITY ELEMENTARY SCHOOL PROJECT SEPTEMBER 2016 INITIAL STUDY/MITIGATED NEGATIVE DECLARATION These intersections were evaluated under six different scenarios to determine the project's effects on level of service. These scenarios provide detailed analysis of the incremental effects of the proposed project on traffic conditions,and to allow a comparison of the traffic anticipated to be generated by the proposed project to the amount of traffic expected to be generated by future development. Each of these scenarios is described below. • Existing Conditions. Existing traffic volumes at the intersections of Broadway and Woodside Road(Intersection 92),Bay Road and Woodside Road(Intersection 93),and Middlefield Road and Woodside Road(Intersection 94)were provided by the City. Existing intersection traffic volumes at the remaining study intersections were obtained from new traffic counts conducted on October 21,2014,and on January 27,2015. Existing AM and PM peak hour traffic volumes are shown in Figure 9. • Existing Plus Project Conditions. Projected peak-hour traffic volumes were estimated by adding the additional traffic generated by the project to existing traffic volumes. Trips generated by the existing land use on the project site were credited(removed) from the gross project generated traffic volumes. Existing Plus Project conditions were evaluated relative to Existing Conditions in order to determine potential project impacts. • Background Conditions. Background traffic volumes were estimated by adding the projected volumes from approved but not yet completed developments in the project area to existing volumes. Lists of approved but not yet completed developments were provided by the City and County. Background Conditions include the first phase of development at the Stanford in Redwood City Precise Plan Project,which is assumed to comprise approximately 37 percent of the total project size at buildout. Background AM and PM peak hour traffic volumes are shown in Figure 10. • Background Plus Project Conditions. Projected peak-hour traffic volumes were estimated by adding the additional traffic generated by the project to background traffic volumes. Background Plus Project conditions were evaluated relative to Background Conditions in order to determine potential project impacts. • Cumulative Conditions. Cumulative conditions without the proposed project(or cumulative baseline)traffic volumes were estimated by applying a compound growth factor of 1 percent per year to existing traffic volumes and adding traffic from approved projects in the vicinity. The cumulative scenario assumes a horizon year of 2020 and full buildout of the Stanford in Redwood City project. Cumulative AM and PM peak hour traffic volumes are shown in Figure 11. • Cumulative Plus Project Conditions. The estimates of trips generated by the project were added to the cumulative volumes to yield Cumulative Plus Project traffic volumes. Analysis Methodology.Traffic conditions within the study area are assessed through the evaluation of intersection Levels of Service (LOS). Level of Service is a qualitative description of operating conditions of an intersection based on the average delay per vehicle. As shown in Table 6, intersection levels of service for signalized and unsignalized intersections range from LOS A,or free- flow conditions with little or no delay,to LOS F,or jammed conditions with excessive delays. P:1RWC1401B Rocketship Sch-I\PRODUCrSUS-MND1Public\Ra ketship Public Review 09-29-16.docx(09/29/16)PUBLIC REVIEW DRAFT 03 ATTY/RESO.0084/CC RESO ADOPTING CEQA-ROCKETSHIP CHARTER SCHOOL APPEAL REV:09-05-17 VR Page 91 of 124