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7A Page 34 reasons, this impact is considered to be significant and unavoidable. Findings: The changes or alterations proposed by mitigation measure 9- 14 are within the responsibility and jurisdiction of Caltrans and not the City of Redwood City. Caltrans can and should adopt proposed mitigation measure 9- 14. Impact 9-15: Project Contribution to Cumulative Impacts at the Middlefield Roadi Jefferson Avenue intersection. During the PM peak hour, project traffic would reduce level of service and increase average delay by five (5) seconds or more at the intersection of Middlefield Road/Jefferson Avenue, which would already be operating at LOS F. This effect would represent a significant impact. Mitigation 9-'15(a). Restripe the southbound approach of Middlefield Road to one through lane and ane right-turn lane, and prohibit southbound lef± turns. These changes would result in LOS E operations during the PM peak hour, thereby reducing the project's impact to aless-than-significanf level. or Mitigation 9-15(b). Implement Mitigafion 9-15(a) plus restripe northbound Middlefield Road to two (2) left-turn lanes and ane shared through/right-turn lane. These changes would result in LOS E during the PM peak hour, thereby reducing the project's impact to aless-than-significant level. or Mitigation 9-15i'c). Restripe the southbound I+J!idd!efie!d Road approach to a shared Left-through lane and one right-turn lane; restripe northbound Middlefield Road to one left-turn lane, one shared left-through lane, and one right-turn lane; and implement a split phase signal operation for northbound and southbound Middlefield Road. These changes would result in LOS E operations during the PM peak hour, thereby reducing the project impacts to a less-than- significantlevel. or Because either the diversion of traffic to pedestrian corridors on Broadway and Middlefield resulting from prohibiting southbound left turns (Mifigafions 9- 95jaJ and bJ}, or the impact on pedestrian signal sequencing with split phase signal operation (Mitigation 9-15fcJ), may potentially degrade the Downtown pedestrian environment and decrease pedestrian safety, comfort, and convenience; and be inconsistent with existing and proposed City policies giving priority to the Downtown pedestrian environment (see section 9.1.1 of this chapter; the City may choose to avoid the three intersection modification options Atty/Reno/Reso.1683 14 030707