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4.2 ENVIRONMENTAL EFFECTS THAT ARE CONSIDERED SIGNIFICANT AND UNAVOIDABLE IMPACTS This section identifies the significant and unavoidable impacts that require a Statement of Overriding Considerations to be issued by the County,pursuant to Section 15093 of the CEQA Guidelines,if the project is approved. Based on the analysis contained in the EIR, the following impacts would be significant and unavoidable: • Traffic o Existing Plus Project Conditions • Increase average vehicle delay at two unsignalized intersections already operating at an unacceptable level of service C'LOS'S by more than threshold of significance • Degrade the LOS at one =signalized intersection from an acceptable to an unacceptable LOS • Degrade the level of service at one freeway off-ramp (diverge) from an acceptable to an unacceptable LOS o Year 2013 Plus Project(Phase I) Conditions • Increase traffic volumes at three freeway ramps by more than threshold of significance o Year 2021 Plus Project(Phases I&II) Conditions • Increase average vehicle delay at two unsignalized intersections already operating at an unacceptable LOS by more than threshold of significance • Degrade the LOS at one unsignalized intersection from an acceptable to an unacceptable LOS and increase the average vehicle delay by more than threshold of significance `J • Increase average vehicle delay at three unsignalized intersections already operating at an unacceptable LOS by more than threshold of significance o Year 2035 Plus Project(Phases I& II) Conditions • Increase average vehicle delay at two signalized intersections already operating at an unacceptable LOS by more than threshold of significance • Increase average vehicle delay at five unsignalized intersections already operating at an unacceptable LOS by more than threshold of significance • Degrade the LOS at one unsignalized intersection from an acceptable to an unacceptable LOS and increase the average vehicle delay by more than threshold of significance • Increase average vehicle delay at one unsignalized intersections by more than threshold of significance • Degrade the LOS at one signalized intersection from an acceptable to an unacceptable LOS. • Add more than 100 trips to six freeway segments already operating at an unacceptable LOS • Add more than one percent traffic to four freeway ramps already operating at an unacceptable LOS • Increase traffic volumes at five freeway ramps by more than one percent threshold of significance • Cause eastbound vehicles stopped at the Roth Road eastern Oakland Subdivision at- grade rail crossing to queue as far back as the I-5 interchange at Roth Road, a condition which would also exist under the 2035 No-Project Conditions, November 2012 15 Findings of Fact/ Statement of Overriding Considerations