Response to Comments - Presidio Trust

the time it takes to plan, design, approve, and implement a project – usually several years or more. Forthis reason, the analysis presented in Section 3 assesses the PHSH alternatives at a specific point in time(2025). By comparing Alternatives 1 through 4 to the Requested No Action Alternative in 2025, it ispossible to discern the project-specific impacts of each alternative. Also, by comparing the alternatives in2025 to the existing conditions described in the affected environment section, it is possible to discern thecumulative impacts to which the PHSH project would contribute, and to compare the relative impacts,with project contributions under Alternatives 1 through 4, to impacts if the project does not proceed(represented by the Requested No Action Alternative).Although not required to discern project impacts, an existing plus project analysis is presented below toallow the reader to compare existing conditions to existing plus project conditions. 9 As shown in Table 6,all of the study intersections would operate at the same level of service as with existing conditions in theAM peak hour except the intersections of Lake Street/14 th Avenue and California Street/14 th Avenue.Under all alternatives, the minor approach(es) to the two-way stop-controlled intersections of LakeStreet/14 th Avenue and California Street/14 th Avenue would operate at LOS E or F rather than LOS C orD, with the exception of Lake Street/14 th Avenue with the Park Presidio Boulevard Access Variant; withthe variant, the stop-controlled approaches at this intersection would operate at LOS D under allalternatives.Similarly, as shown in Table 7, four of the eight study intersections would operate at the same acceptablelevels of service as with existing conditions in the PM peak hour under all four alternatives. Anadditional two intersections (Lake Street/15 th Avenue and Lake Street/Park Presidio Boulevard) wouldoperate at the same levels of service as with existing conditions under all alternatives except Alternative1, where existing LOS B conditions would fall to LOS C conditions at both intersections (with thecouplet). Under all alternatives, the minor approach(es) to the two-way stop-controlled intersection ofLake Street/14 th Avenue would fall from LOS D to LOS E or F, and the minor approach(es) to the twowaystop-controlled intersection of California Street/14 th Avenue would either continue operating at LOSE (Alternatives 2, 3, and 4 with the Park Presidio Boulevard Access Variant) or fall from LOS E toLOS F.In summary, when traffic volumes generated by the PHSH alternatives are added to existing conditions,no new potentially significant impacts (i.e., LOS E or F conditions) would occur during the AM or PMpeak hour, beyond the significant impacts already identified in the cumulative analysis at the two-waystop-controlled intersections of Lake Street/14 th Avenue and California Street/14 th Avenue. Any impactsat the intersections of Lake Street/14 th Avenue and California Street/14 th Avenue could be addressed bymitigation measures included in Section 3.9 A more detailed discussion of the analysis is available in Appendix B (Memo No. 4).54 Responses to Comments Public Health Service Hospital