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Attachment A <br />Page 3 <br />Table 1 – Level of Service Information <br />Level of Average Control Delay <br />Description <br />Service (seconds/vehicle) <br />Minimal control delay; traffic operates at primarily free-flow <br />A0-10 (Unsignalized); 0-10 (Signalized) <br />conditions; unimpeded movement within traffic stream. <br />Minor control delay at signalized intersections; traffic <br />B >10-15 (Unsignalized); >10-20 (Signalized)operates at a fairly unimpeded level with slightly restricted <br />movement within traffic stream. <br />Moderate control delay; movement within traffic stream <br />C >15-25 (Unsignalized); >20-35 (Signalized)more restricted than at LOS B; formation of queues <br />contributes to lower average travel speeds. <br />Considerable control delay that may be substantially <br />D >25-35 (Unsignalized); >35-55 (Signalized)increased by small increases in flow; average travel speeds <br />continue to decrease. <br />High control delay; average travel speed no more than 33 <br />E >35-50 (Unsignalized); >55-80 (Signalized) <br />percent of free flow speed. <br />Extremely high control delay; extensive queuing and high <br />F >50 (Unsignalized); >80 (Signalized) <br />volumes create exceedingly restricted traffic flow. <br /> <br />