SU0004098 - Laserfiche WebLink

Home Browse Search

TRANSPORTATION AND CIRCULATION IMPACTS — YEAR 2027 BASE CONDITIONS Impact 3A—Change in Level of Service on SR 132 between the I-580 and I-5 Interchanges The SR-132/13ird Road interchange and associated highway improvements along SR-132 were assumed ` to be constructed and in place for the year 2007 base and year 2007 plus project traffic conditions. The year 2027 base conditions weave section, ramp junction and mainline peak hour analysis identified projected Levels of Service with a four-lane freeway between the I-580 and I-5 interchanges that would L be worse than acceptable Level of Service standards. This is a significant impact which can be reduced to less than significant with mitigations. �. Mitigation Measure 3A Caltrans Concept Facility for SR-132 is a four-lane freeway from I-580 to just past the I-5 junction and the Ultimate Transportation Corridor(UTC) within this segment is for a six-lane freeway. An evaluation prepared in support of the separate SR-132/13ird Road Interchange Project concluded that a six-lane freeway section on SR-132 within these limits (consistent with the UTC) would provide the capacity .. needed for acceptable traffic operations through the year 2027. The separate interchange project does not, however, include the construction of a six-lane freeway between the I-580 and I-5 interchanges. A shorter term traffic operations analysis was also prepared for the SR-132/13ird Road Interchange Project that indicated that mainline SR-132 between the junctions with I-580 and I-5 would require the six-lane freeway segment in the year 2017 in order to obtain acceptable Levels of Service. Caltrans has concurred with this conclusion and approved the use of a 10 year design period for the interchange project. Caltrans and the County also concurred that the construction of the additional lanes on SR-132 would be included as part of a future regional project. Level of Significance After Mitigation: Less-Than-Significant Impact 3B—Change in Level of Service on SR 132 East of the I-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). This is a significant impact. Mitigation Measure 3B The Concept Facility for SR-132 from just past the I-5 junction to Route 99 in the City of Modesto is a four-lane expressway. The Ultimate Transportation Corridor (UTC) within this same segment is a four- lane freeway. As this segment of SR-132 was considered outside of the SR-132Bird Road Interchange Project, no improvements were identified as part of that project. Improvements to SR-132 are identified as a placeholder in the 2004 SJCOG Regional Transportation Plan (RTP). SR-132 is,however,identified with an asterisk (*) in the 2004 SJCOG RTP which means it has not been funded through construction. Even with the improvement of SR-132 to a four-lane freeway standard, mainline operations in the westbound direction during the AM peak hour and in the eastbound direction during the PM peak hour are projected to be at LOS"E". To achieve acceptable Levels of Service would require construction of a y, six-lane freeway which exceeds Caltrans UTC concept and improvements currently being considered for SR-132. As such, impacts on SR-132 would not be reduced to less-than-significant levels. V 2"'Draft DeSsIva Gates Quarry Trak&Circulation Analysis 51 October 2005 Jones&Stakes (R9057-IS002/25-4000-01) L