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r~ <br />Dowling Associates, Inc. i +~ <br />Transportation Engineering • Planning • Research • Education <br />Table 2 <br />Level of Service Criteria <br />Signalized Intersections <br />Level of A~~erage <br />Senlce Vehicle <br />~L,OS) Control Delay Descriation <br />Seconds <br />A < 10.0 Free Flow/Insignificant Delays: No approach phase is fully utilized by <br /> traffic and no vehicle waits longer than one red indication. <br />B 10.1-20.0 Stable Operation/Minimal Delays: An occasional approach phase is fully <br /> utilized. Many drivers begin to feel somewhat restricted within platoons of <br /> vehicles. <br />C 20.1-35.0 Stable Operation/Acceptable Delays: Major approach phases fully utilized. <br /> Most drivers feel somewhat restricted. <br />D 35.1-55.0 Approaching Unstable/Tolerable Delays: Drivers may have to wait <br /> through more than one red signal indication. Queues may develop but <br /> dissipate rapidly, without excessive delays. <br />E 55.1-80.0 Unstable Operation/Significant Delays: Volumes at or near capacity. <br /> Vehicles may wait through several signal cycles. Long queues form <br /> upstream from intersection. <br />F • 80 Forced Flow/Excessive Delays: Represents jammed conditions. Intersection <br /> operates below capacity with low volumes. Queues may block upstream <br /> intersections. <br />Source: Transportation Research Board, "Highway Capacity Manual," 2000 <br />The Existing+Approved peak hour Levels of Service (LOS) were calculated for the 44 existing <br />study intersections. Table 3 presents the results of the level of service calculations prepared for <br />this analysis. <br />Traffic Analysis Page 8 <br />Nonce Depot Shopping Center, Pleasanton <br />