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5.2 LEVEL OF SERVICE OVERVIEW An intersection capacity analysis was performed at the study intersections for the five (5) scenarios listed in Table 9. The capacity analysis was performed for the weekday AM and PM peak hours, and traffic modeling software was used to determine intersection delay and level of service (LOS). LOS is a quantitative measure used by traffic engineers to describe the operations of an intersection or along a roadway segment. It ranges from A to F, with A being the best and F being the worst level of operation. LOS A conditions are characterized by minimal vehicle delay and free -flow conditions, while LOS F is characterized by long vehicle delay — usually when demand exceeds available roadway capacity. Although LOS E is defined as at -capacity, LOS D is generally the minimum acceptable level of operation at an intersection in the Twin Cities Metro area. Each study signalized and stop -controlled intersection was analyzed based on the Highway Capacity Manual using Synchro 11/SimTraffic software. For unsignalized intersections, LOS was reported for the worst approach and the overall intersection. This was done to ensure that the mainline LOS did not hide any potential issues on the minor street. The overall intersection LOS was reported for signalized intersections. Roundabout intersections were analyzed using roundabout analysis software Rodel, with results reported at 50% confidence levels. Table 10 provides the LOS grading criteria for unsignalized and signalized intersections. For the purposes of this traffic analysis, it was assumed that acceptable level of service for the overall intersection is LOS D or better and the acceptable level of service for an individual movement is LOS E or better. TABLE 10: LEVEL OF SERVICE GRADING CRITERIA Level of Service Average Control Delay (seconds/vehicle) at: Unsignalized Intersections Signalized Intersections A 0-10 0-10 B >10-15 >10-20 C >15-25 >20-35 D >25-35 >35-55 E >35-50 >55-80 F >50 >80 5.3 EXISTING (2024) CONDITIONS LEVEL OF SERVICE ANALYSIS A capacity analysis was performed for 2024 Existing traffic conditions at the study intersections to determine existing operating conditions. The analysis was performed for weekday AM and PM peak hours and is based on the traffic volumes provided in Exhibit 3. Existing intersection control and geometry was assumed for this analysis, as shown in Exhibit 2. Table 11 provides a summary of the capacity analysis at the study intersections. Based on the analysis, all movements operate at an acceptable LOS except for the northbound left turns at Northern Heights which operates at LOS E during the PM peak hour due to the high number of through trips along CSAH 96. This movement sees a volume of less than 10 vehicles during the PM peak hour. At Mounds View Boulevard & TCAAP AUAR Update I Traffic Analysis April 2024