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two be worse than acceptable Level of Service standards. With the project, these conditions would still exist. b. This is a significant impact which can be reduced to less than significant with mitigations. Mitigation Measure 6A L The mitigation measure identified for the year 2027 base conditions (Mitigation 3A incorporated by reference)would be sufficient to also mitigate project impacts. Level of Significance After Mitigation: Less-Than-Significant L Impact 6B—Change in Level of Service on SR 132 East of the 1-5 Interchange The year 2027 base conditions mainline peak hour analysis identified projected Levels of Service on the SR-132 four-lane freeway segment and the two-lane highway segment to the east of the I-5 interchange that would be worse than acceptable Level of Service standards (unacceptable Levels of Service on the two lane segment was also identified for existing traffic conditions). With the project, these conditions would still exist. This is a significant impact. a. Mitigation Measure 6B To mitigate year 2027 base conditions required construction of a six-lane freeway which exceeds Caltrans UTC concept and improvements currently being considered for SR-132 and impacts on SR-132 would not be reduced to less-than-significant levels. This conclusion would also be the same for the year 2027 a plus project condition. The project would contribute 0.2% of the projected growth in traffic volumes between existing conditions and the year 2027 along this segment of SR-132. Level of Significance After Mitigation: Significant Impact 7—Traffic Signal Warranted at the Bird Road/SR-132 Eastbound Ramps Intersection The year 2027 plus project conditions operational analysis indicated that the SR-132 eastbound ramps/Bird Road intersection geometries will provide sufficient capacity at acceptable Levels of Service. The traffic study prepared in support of the interchange project, however, identified that a traffic signal would be warranted by the year 2027 at this intersection. This is a less-than-significant impact with mitigation. Mitigation Measure 7 The installation of a traffic signal at the Bird Road/SR-132 eastbound ramps intersection is not warranted when the interchange is first constructed and open for use, and is not projected to be warranted for at least 15-20 years. As such, the traffic signal will not be installed as part of the interchange project but would be installed when traffic or safety warrants its' installation. By the year 2027, project traffic is estimated to represent approximately 4.5%of all traffic at this intersection. Level of Significance After Mitigation: Less-Than-Significant ` Impact 8—Structural Damage to Existing County Roadways Traffic forecasted for the year 2027 plus project condition would increase the estimated structural section L T.I. over the estimated year 2027 base conditions structural section T.I. on both Koster Road from the 2nd Draft DeSilva Gates Quarry Traffic&Circulation Analysis 53 October 2005 Jones&Stokes (R9057/S002/25-4000-02)