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4.Environmental Analysis represent a significant safety hazard because there is only one travel lane on SR 132, and traffic on SR 132 travels at high speeds. Mitigation Measure — Measure 4.4.3: If Haul Route Option 2 is approved,the project applicant would be required to fund the project's fair share contribution to necessary upgrades to the — intersection of SR 132 and Koster Road(including left-turn lanes and acceleration/deceleration lanes). Impact Significance After Mitigation: If Mitigation Measure 4.4.3 were funded and implemented,the traffic safety impact would be reduced to a less-than-significant level. Impact 4.4.4: Project-generated traffic could result in accelerated pavement deterioration — on study area roadways.This would be a potentially significant impact. The traffic index is a measure of the number of equivalent single axle loads (ESALs)expected — over the design period,and is described in detail in the Caltrans Highway Design Manual. The existing ESALs on Blewett and Bird Roads were estimated by performing 24-hour traffic counts and by a review of the environmental impact reports for Brown Sand and Gravel and Teichert — Aggregates. The following table presents a summary of the traffic index analyses. The supporting calculations are presented in Appendix C. Considering that this traffic impact study is not a design-level document, it is not recommended that the traffic index values presented herein be used for design purposes. More extensive traffic counts would be required for design; however, this information provides some estimate of the — need for roadway upgrades resulting directly from project-generated traffic. Mitigation Measures Measure 4.4.4: Pavement Upgrades and Replacement. As a condition of approval,the project applicant or successor-in-interest will be required to enter into an agreement with the San Joaquin County Department of Public Works regarding the replacement/upgrade and maintenance of roadways affected by the project.Upgrades and replacements will be completed to the Traffic Index identified in Table 4.4-5,unless the need for a different Traffic Index is indicated by future traffic counts. Bird Road Between Blewett Road and SR 132 _ The project applicant or successor-in-interest shall contribute its fair share to future pavement upgrades on this road segment. RMC Pacific Vernalis Quarry Mining and Reclamation Project 4.4-18 ESA/203015 Draft Environmental Impact Report May 2006