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4 Environmental Analysis <br /> 4.15 Transportation <br /> relatively low traffic volumes, construction vehicles associated with PG&E improvements are not <br /> anticipated to cause hazards to other roadway users traveling to and from the Project site. Thus, <br /> PG&E improvements would not substantially increase hazards due to a geometric design feature <br /> or incompatible use. <br /> Finally, Midway Road connects the Project site to Patterson Pass Road, which would allow for <br /> any emergency vehicles to easily access the Project site, including the PG&E Tesla Substation <br /> and gen-tie corridor where PG&E improvements would occur. The gen-tie corridor is also <br /> assumed to be up to 100 feet in width and would include a maintenance road, allowing for <br /> adequate emergency access along the gen-tie corridor. Thus, construction of PG&E infrastructure <br /> would provide adequate emergency access. <br /> Ultimately, PG&E improvements would have less than significant impacts related to <br /> transportation, similar to the Project. <br /> 4.15.6 Cumulative Impacts <br /> As discussed above, the Project would have less than significant impacts with respect to conflicts <br /> with adopted policies, plans, or programs regarding public transit, bicycle, or pedestrian facilities, <br /> or otherwise decrease the performance or safety of such facilities. Therefore, the Project could <br /> neither cause nor contribute to any potential significant cumulative effect regarding these <br /> considerations. <br /> The potential for cumulative transportation impacts exists where there are multiple projects <br /> proposed in an area that have overlapping construction schedules and/or project operations that <br /> could result in a substantial contribution to increased traffic levels throughout the surrounding <br /> roadway network. <br /> For the purposes of the cumulative analysis of transportation impacts, only other projects that <br /> contribute, or could contribute, traffic to the same roadway segments as the Project should be <br /> included. Because the volume of traffic generated would not be particularly high during site <br /> clearing and construction and decommissioning and would be substantially less during operation <br /> and maintenance activities, only segments of Midway Road and Patterson Pass Road would <br /> experience increases in traffic. Therefore, the geographic scope for cumulative impacts consists <br /> of those two roadway segments. <br /> Similar to the Project analysis above, which focused on the construction phase of the Project, the <br /> temporal scope for cumulative transportation impacts is limited to the construction and <br /> decommissioning phases because activities during these times would contribute the most traffic <br /> to roadways within the geographic scope. <br /> Past, present, and reasonably foreseeable future actions making up the cumulative scenario are <br /> identified in Table 2-3. Past projects have been constructed and so would contribute only ongoing <br /> operational traffic to area roadways during the Project's construction phase. The ongoing impacts <br /> associated with past projects are accounted for as part of baseline conditions for the Project and <br /> are described as part of the existing conditions described above. That evaluation indicates that <br /> vehicular circulation would continue to operate acceptably under Project conditions. <br /> Griffith Energy Storage Project 4.15-19 Tetra Tech/SCH 2022120675 <br /> Draft Environmental Impact Report August 2023 <br />