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III. ENVIRONMENTAL SETTING IMPACTS AND MITIGATION MEASURES C. TRAFFIC CIRCULATION AND SAFETY TABLE III.0-1 EXISTING PEAK-HOUR ROADWAY VOLUMES AM Peak Hour PM Peak Hour Truck Truck Roadway Segment Total Percent Total Percent Interstate 5 South of Charter Way 6,700 24% ' 8,000 24%I Charter Way West of Fresno Avenue 910 15% 1,140 9% East of Fresno Avenue 1,020 13%n 1,120 11% West of Stockton Street 1,500 16% 1,720 15% East of Stockton Street 1,990 17% 2,090 15% Fresno Avenue North of Navy Drive 770 13%n 1,020 8% Charter Way to Navy Drive 660 12% 830 7% Navy Drive Fresno Ave.to Pershing Ave. 160 33% 210 19% East of Pershing Avenue 190 21% 170 20% Stockton Street North of Charter Way 350 31% 260 31% 1 The truck percentage for I-5 represents daily truck volumes from Caltrans'data,and is presented for general order-of-magnitude information only;truck percentages during the a.m.and p.m.peak hours could differ. SOURCES: Environmental Science Associates, 1999;and Caltrans' 1998 Trak Volumes on California State Highways, 1999 lengthy delays). Intersection LOS ratings were calculated using the Transportation Research Circular No. 212 planning methodology (for signalized intersections) and the analysis methodology presented in the Highway Capacity Manual(for unsignalized intersections) (Transportation Research Board, 1980 and 1994,respectively). LOS descriptions for signalized and unsignalized intersections are provided in Tables III.0-2 and III.0-3. Current a.m. and p.m. peak-hour traffic level of service conditions at four key intersections within the vicinity of the project site were determined using traffic counts of existing turning movement volumes during an extended a.m.peak period(6:00 to 9:00 a.m.)and the typical p.m. peak period (4:00 to 6:00 p.m.).' To account for the influence of trucks on intersection operations,the turning movement volumes were adjusted upward by applying passenger-car- equivalence factors. As shown in Table III.0-4, the study intersections currently operate at LOS C or better,except the unsignalized Charter Way/Stockton Street intersection(particularly the Stop-sign-controlled southbound Stockton Street left turn), which operates at LOS F. The traffic count data and level of service calculations are on-file and available for review at the City of Stockton Department of Community Development(Planning Division), 345 North El Dorado Street. i Peak period traffic turning movement counts(with vehicle classification[autos vs.trucks])were conducted by - Environmental Science Associates on Tuesday,August 31, 1999 at the intersections of Navy Drive/Fresno Avenue,Charter Way/Stockton Street,and Charter Way/Fresno Avenue,and on Thursday,November 4, 1999 at the intersection of Navy Drive/Pershing Avenue. Stockton Scavenger Transfer Station Expansion III.C.2 ESA/990190