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TRAFFIC & PARKING IMPACT LETTER - DRAFT <br />ANOKA RAMSEY ATHLETI C ASSOCIATION DOME <br />TVEL OF SERVICE AND DELAY <br />For this report the Level of Service (LOS) will be analyzed. For signalized intersections, the LOS is defined in <br />terms of the average total vehicle delay of all movements through an intersection. Vehicle delay is a method of <br />quantifying several intangible factors, including driver discomfort, frustration, and lost travel time. Specifically, <br />LOS criteria is stated in terms of average delay per vehicle during a specified time period (peak hour). Vehicle <br />delay is a complex measure based on variables including signal phasing, signal cycle length, and traffic <br />volumes with respect to intersection capacity. Figure 3 shows the LOS table for signalized intersections. <br />Table 1. <br />Level of Service Criteria for Signalized Intersections <br />Level of <br />Service <br />Average Control Delay <br />(secveh) <br />General Description <br />(Signalized Intersections) <br />A <br />s10 <br />Free Flow <br />B <br />>10 - 20 <br />Stable Flow (slight delays) <br />C <br />>0 - 35 <br />Stable flaw (acceptable delays) <br />D <br />>35 - 55 <br />Approaching unstable flow (tolerable delay, occasionally wait <br />through~ more than one signal cycle before proceeding) <br />E <br />>55 - 80 <br />Unstable flog (intolerable delay) <br />F <br />>80 <br />Forced flow (jammed) <br />Figure 3 Highway Capacity Manual (HCM) 61" Edition, 2016 Signalized Intersection LOS. <br />For unsignalized intersections LOS criteria can be further reduced into two (2) intersection types: all -way -stop - <br />controlled and two -way -stop -controlled. All -way, stop -controlled intersection LOS is expressed in terms of the <br />average vehicle delay of all of the movements, much like that of a signalized intersection. Two -way -stop - <br />controlled intersection LOS is defined in terms of the average vehicle delay of an individual movement(s). This is <br />because the performance of a two-way, stop -controlled intersection is more closely reflected in terms of its <br />individual movements, rather than its terms of its individual movements. Figure 4 shows the LOS table for <br />unsignalized intersections. <br />Table 2. Level of Service Criteria for Unsignalized Intersections <br />Level of Service Average Control Delay (sec/veh) <br />A 0-10 <br />B ;10- 15 <br />C >15-25 <br />D >2S-35 <br />E >35 - 50 <br />F >50 <br />Figure 4 Highway Capacity Manual (HCM) 61" Edition, 2016 Unsignalized Intersection LOS. <br />The studied intersections currently operate at a high LOS with the lowest LOS rating of B at Intersection 1. Delays <br />experienced are approximately 15.7 seconds within the intersection. <br />Architecture + Engineering + Environmental + Planning <br />Page 7 <br />