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Project Banjo Traffic Study — Regional Analysis Addendum April 22, 2022 <br />Page 5 <br />For side -street stop -controlled intersections, special emphasis is given to providing an estimate for the <br />level of service of the side -street approach. Traffic operations at an unsignalized intersection with side - <br />street stop control can be described in two ways. First, consideration is given to the overall <br />intersection level of service, which takes into account the total number of vehicles entering the <br />intersection and the capability of the intersection to support the volumes. <br />Second, it is important to consider the delay on the minor approach. Since the mainline does not have <br />to stop, most delay is attributed to the side -street approaches. It is typical of intersections with higher <br />mainline traffic volumes to experience high -levels of delay (i.e., poor levels of service) on the side - <br />street approaches, but an acceptable overall intersection level of service during peak hour conditions. <br />The existing intersection capacity analysis shown in Table 2 indicates that all study intersections <br />currently operate at an overall LOS B or better during the a.m., midday (10 to 11 a.m.), and p.m. peak <br />hours. In addition, side -street approaches and/or driveways operate at LOS D or better during the <br />peak hours. Peak queues within the study area are well within the existing turn lane storages <br />provided. Thus, no significant intersection capacity issues are present within the study area. Analysis <br />results showing the average delays and queue lengths is available upon request. <br />Table 2 Existing Intersection Capacity <br />Intersection <br />Traffic <br />Control <br />Level of Service (Delay) <br />AM Peak Hour <br />Midday Peak <br />Hour <br />PM Peak Hour <br />20th Avenue / Main Street <br />SIGNAL <br />B (16 sec) <br />B (10 sec) <br />B (18 sec) <br />201h Avenue / Commerce Drive <br />SSS <br />A / B (11 sec) <br />A / B (10 sec) <br />A / B (11 sec) <br />201h Avenue / Fairview Street <br />SSS <br />A / A (1 sec) <br />A / A (1 sec) <br />A / A (1 sec) <br />201h Avenue / Cedar Street <br />SSS <br />A / B (10 sec) <br />A / B (10 sec) <br />A / B (11 sec) <br />21s' Avenue / Main Street <br />SIGNAL <br />A (6 sec) <br />A (5 sec) <br />A (8 sec) <br />215t Avenue / Commerce Drive <br />SSS <br />A / A (9 sec) <br />A / A (9 sec) <br />A / A (9 sec) <br />215t Avenue / Fairview Street <br />FUTURE <br />Main Street / 1-35E West Ramp <br />SIGNAL <br />A (8 sec) <br />A (7 sec) <br />A (8 sec) <br />Main Street / 1-35E East Ramp <br />SIGNAL <br />B (10 sec) <br />A (8 sec) <br />B (12 sec) <br />AWSC — All -Way -Stop -Control SSS — Side -Street -Stop <br />Note that the Main Street / 1-35E interchange was reconstructed during 2010 and 2011 to increase <br />intersection and roadway capacity in anticipation of and to accommodate future development in the <br />area. The south approach at the West Ramp intersection was added as part of the project, but <br />subsequently removed in 2013 to further improve operations and safety once full access at the Main <br />Street / 21s' Avenue intersection was provided. The Main Street / 21st Avenue intersection was <br />signalized in 2013. 21st Avenue, south of Commerce Drive, was constructed in 2017. <br />