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- #51512 . <br /> Transportation Impact Report <br /> February 11, 1986 <br /> Page Seven - <br /> ' Appendix "B.. • <br /> Operating Conditions for Levels of Service: <br /> tk. Level of Service A: This is a condition of free flow, <br /> accompanied by low volumes and high speeds. <br /> Level of Service B: This occurs in the zone of stable flow, <br /> with operating speeds beginning to be restricted somewhat by <br /> traffic conditions. <br /> Level of Service C: This is still in the zone of stable flow, <br /> but speeds and maneuverability are more closely controlled by <br /> k. the higher volumes. <br /> r; - <br /> Level of Service D: This level of service approaches unstable <br /> flow, with tolerable operating speeds being maintained, though <br /> I-• considerably affected by changes in operating conditions. <br /> Level of Service E: This cannot be described by speed alone, <br /> 1 but represents operations at lower operating speeds, typically, <br /> � but not always, in the neighborhood of 30 miles per hour, with <br /> volumes at or near capacity of the highway , <br /> :if. Level of Service F: This describes a forced-flow operation at <br /> low speeds, where volumes are below capacity_ In the extreme, <br /> 1 both speed and volume can drop to zero. <br /> _,. <br /> ..: <br /> i <br /> 1 <br /> yZ. <br /> 1 R' <br /> I , <br />