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HARBOR BLVD. MIXED USE TRANSIT CORRIDOR PLAN FINAL FIR <br />CITY OF SANTA ANA <br />5. Environmental Analysis <br />TRANSPORTATION AND TRAFFIC <br />Table 5.13 -1 Level of Service Descriptions <br />Level of <br />Range of Vic <br />Service <br />Ratios <br />Definition <br />Free Flow. Individual users are virtually unaffected by the presence of others in the traffic stream. <br />A <br />0.00 -0.60 <br />Freedom to select desired speeds and to maneuver within the traffic stream is extremely high. The <br />general level of comfort and convenience provided to the motorist, passenger, or pedestrian is <br />excellent. <br />Stable flow. The presence of other users in the traffic stream begins to be noticeable. Freedom to <br />select desired speeds is relatively unaffected, but there is a slight decline in the freedom to maneuver <br />B <br />0.61 -0.70 <br />within the traffic stream with LOS A. The general level of comfort and convenience provided is <br />somewhat less than that of LOS A, because the presence of others in the traffic stream begins to <br />affect individual behavior. <br />Stable flow. This LOS marks the beginning of the range of flow in which the operation of individual <br />users becomes significantly affected by interactions with others in the traffic stream. The selection of <br />C <br />0.71 -0.80 <br />speed is affected by the presence of others, and maneuvering within the traffic stream requires <br />substantial vigilance on the part of the user. The general level of comfort and convenience declines <br />noticeably at this level. <br />High density, but stable flow. Speed and freedom to maneuver are severely restricted, and the drive <br />D <br />0.81 -0.90 <br />or pedestrian experiences a generally poor level of comfort and convenience. Small increases in <br />traffic flow will generally cause operational problems at this level. <br />Operating conditions at or near the capacity level. All speeds are reduced to a slow but relatively <br />uniform value. Freedom to maneuver within the traffic stream is extremely difficult, and generally <br />E <br />0.91 -1.00 <br />accomplished by forcing a vehicle or pedestrian to "give way" to accommodate such maneuvers. <br />Comfort and convenience levels are extremely poor, and drivers or pedestrian frustration is generally <br />high. Operations at this level are usually unstable because small increases in flow or minor variations <br />within the stream will cause a breakdown. <br />Forced or breakdown flow. This condition exists wherever the amount of traffic approaching a point <br />F <br />> 1.00 <br />exceeds the amount which can traverse that point. Queues form up behind such locations as arrival <br />flow exceeds discharge flow. <br />boulCe: Itll[ut J. <br />Roadway Level of Service <br />Arterial roadway segment performance is based on the capacity of the facility (as determined by the <br />functional classification, roadway geometries, and number of through lanes) and the average daily traffic <br />(ADT) volumes. The City of Santa Ana General Plan Circulation Element evaluates roadway segment <br />performance in terms of LOS, where the thresholds for each LOS grade are based on daily volume -to- <br />capacity (V /C) ratios. The maximum average daily volumes for arterial roadways by street classification and <br />lane configuration and the corresponding level of service are summarized in Table 5.13 -2. The minimum <br />acceptable level of service for roadway segments established by the circulation element is LOS D. <br />Page 5.13 -2 PlaceWorkr <br />