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Munn&Perkins Quarry Excavation Permit Travel Patterns Travel patterns(within and external to the site)would not be affected by extending operating 1 r hours at the Project site, as off-site Project-related vehicles would use the current site access road to enter and exit the Quarry property, and onsite vehicles and heavy equipment would continue to move along roadways within the confines of the Quarry property boundaries. Trip Generation The intensity and nature of the Project activities associated with extending operating hours would vary,and the number of vehicle trips generated by that activity would similarly vary.As noted in Chapter 2.0,Project Description,the Project is expected to generate a maximum of 33 loaded truck trips(66 one-way truck trips)during the first extended hour(9:00 to 10:00 PM) and about 1 13 loaded truck trips(26 one-way truck trips)per hour between 10:00 PM and 5:00 AM,resulting in approximately 248 one-way truck trips between 9:00 PM and 5:00 AM. Transportation Conditions with Project Activities The nighttime truck trips would travel on different roads, depending on the location of the construction needing the facility's asphalt material. Given the road network serving the Project site, it is assumed that Project-generated trips could use the following travel routes,as depicted on Figure 2-3. (1)from the Modesto area(and points south on SR 99 and west on SR 132), trucks would travel north along McHenry Avenue and turn right(east)onto East River Road to the Project site; (2)from the Escalon area(and points north of Escalon, and east or west on SR 120), trucks would travel south along McHenry Avenue and turn left(east)onto East River Road to the Project site; and(3)from the Riverbank area(and points east on SR 1.08 and southeast on SR 132),trucks would travel north along Santa Fe Road and turn left(west)onto East River Road to the Project site. Because the nighttime trucks could utilize any of the above-described haul routes,the analysis evaluated the effect of 100 percent of the Project-generated trips on each roadway individually. Because the highest Project-generated traffic would occur between 9:00 and 10:00 PM, and the highest existing hourly traffic volume on the study roadway between 9.00 PM and 5:00 AM occurs between 9:00 and 10-00 PM,analysis of Project impacts during that hour ensures that potential impacts are not underestimated. As shown in Table 3.2-2,the increase in traffic associated with the nighttime activities at the Quarry site would change the existing service level during the peak nighttime traffic period(9:00 to 10:00 PM)from LOS B to LOS C on four of the five study roadway segments, but all road segments would continue to operate at an acceptable level of service.Detailed traffic level of service calculation sheets are located in Appendix C. Munn&Perkins Quarry Excavation Permit 3.2-8 ESA 1211088 Draft EIR April 2011