2022-05-03 P & Z Packet - Laserfiche WebLink

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Project Banjo Traffic Study — Regional Analysis Addendum April 22, 2022 Page 3 • 21"Avenue — a local roadway that varies between a 2-lane undivided facility from Main Street to Commerce Drive and a 3-lane facility with a shared two-way left -turn lane south of Commerce Drive. The facility terminates approximately 900 feet south of Fairview Street. No multimodal facilities are present. The posted speed limit is 30-mph. • Commerce Drive — a 3-lane local roadway with a shared two-way left -turn lane. No multimodal facilities are present. The posted speed limit is 30-mph. • Fairview Street — a two-lane undivided local roadway which currently terminates about 800 feet east of 201" Avenue. This roadway is expected to be extended to 21St Avenue in 2022. No multimodal facilities are present. The posted speed limit is 30-mph. • Cedar Street —a two-lane undivided local roadway which primarily serves residential land uses. No multimodal facilities are present. The posted speed limit is 30-mph. From a traffic control perspective, intersections along Main Street at 20t" Avenue, 21st Avenue, and the 1-35E West and East Ramps are signalized. All other study intersections are unsignalized with side -street stop control. Existing geometrics, traffic controls, and traffic volumes in the study area are shown in Figure 2. Intersection Capacity Intersection capacity was evaluated using Synchro/SimTraffic Software (version 11), which incorporates methods outlined in the Highway Capacity Manual, 6th Edition. The software is used to develop calibrated models that simulate observed traffic operations and identify key metrics such as intersection Level of Service (LOS) and queues. These models incorporate collected traffic, pedestrian, and bicyclist volumes, traffic controls, and driver behavior factors. Level of Service (LOS) quantifies how an intersection is operating. Intersections are graded from LOS A through LOS F, which corresponds to the average delay per vehicle values shown in Table 1. An overall intersection LOS A though LOS D is generally considered acceptable in the Twin Cities. LOS A indicates the best traffic operation, while LOS F indicates an intersection where demand exceeds capacity. Table 1 Level of Service Thresholds Average Delay / Vehicles Level of Service Stop, Yield, and Roundabout Intersections Signalized Intersections A < 10 seconds < 10 seconds B 10 to 15 seconds 10 to 20 seconds C 15 to 25 seconds 20 to 35 seconds D 25 to 35 seconds 35 to 55 seconds E 35 to 50 seconds 55 to 80 seconds F > 50 seconds > 80 seconds