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4.2 TRAFFIC AND CIRCULATION At the intersections of Lower Sacramento/Peltier and Davis/Turner,which are four-way stop controlled, some approaches experience higher volumes creating somewhat longer delays, however, these intersections still operate efficiently and delays are short. At the intersection of Davis/State Route 12, operating conditions are currently at LOS E for the Davis Street approaches during both the AM and PM peak hours. The primary delays occur to the left-turn and through movements, as they must negotiate across/into the unimpeded State Route 12 traffic flow which travels at a relatively high rate of speed. In addition,separate left-turn lanes create a wider path across which the Davis Street vehicles must maneuver, further reducing their ability to enter the intersection. Traffic Signal Warrant Assessment Peak-hour signal warrant analyses were conducted for the unsignalized intersections. The peak-hour signal warrants refer to minimum traffic volume thresholds identified by the U.S. Department of Transportation. (Signal warrant calculation sheets are on file at the San Joaquin County Community Development Department.) When an intersection's peak-hour volumes exceed the minimum thresholds, a traffic signal could be warranted. Based on the peak hour volumes and the number of approach lanes at the studied intersections, the Davis/State Route 12 intersection qualifies for signalization under existing conditions. The volumes at this intersection during the peak hours (particularly the PM peak hour) are at the minimum threshold levels established by the Department of Transportation for intersections where the major street speed exceeds 40 miles per hour. However, intersections that qualify for signalization under the peak hour criteria require further analyses of other factors, including accident history, proximity of other intersections/driveways, and potential volume increases, before a signal is actually installed. ENVIRONMENTAL IMPACTS AND MITIGATION MEASURES Significance Criteria CEQA Guidelines indicate that a project normally will have significant traffic impacts if it causes a substantial increase in traffic relative to the existing traffic load and capacity of the street system. For the purposes of this EIR, the following are considered potentially significant traffic and circulation impacts: • At minor street stop-controlled intersections, increases in traffic volumes as a result of the proposed project which would result in a change of the level of service (LOS) for the minor street turning movement. 4.2-7