07-25-16-R - Laserfiche WebLink

Home Browse Search

John Slack, Perkins + Will May 2, 2016 Land O’Lakes Expansion TS Update Page 3 The following traffic control is currently in place at study intersections: • County Road F/Hamline Avenue: Traffic signal • County Road F/Innovation Way (Land O’Lakes Central Access): Side-street stop control • County Road F/Land O’Lakes East Access: Side-street stop control • County Road F/Lexington Avenue: Traffic signal • Lexington Avenue/Land O’Lakes South Access: Side-street stop control Field observations were completed to identify roadway characteristics within the study area (i.e. roadway geometry, posted speed limits, and traffic controls). Lexington Avenue is currently a five-lane undivided roadway with a continuous center two-way left-turn lane and a posted speed limit of 40 miles per hour (mph). However, Lexington Avenue is currently being reconstructed to include a raised median, which will alter access within the study area. Further details regarding the Lexington Avenue reconstruction are documented later in this study. County Road F, west of Lexington Avenue, is primarily a two-lane undivided roadway with a posted speed limit of 45 mph. County Road F, east of Lexington Avenue, is primarily a four-lane undivided roadway with a posted speed limit of 40 mph. It should be noted that both Lexington Avenue and County Road F are functionally classified as minor arterials. Existing geometrics, traffic controls, and traffic volumes in the study area are shown in Figure 2. Existing Intersection Capacity Analysis An existing intersection capacity analysis was completed to establish a baseline condition to which future traffic operations can be compared. The capacity analysis was completed for the a.m. and p.m. peak hours using Synchro/SimTraffic software (V9.1). Capacity analysis results identify a Level of Service (LOS), which indicates the quality of traffic flow through an intersection. Intersections are given a ranking from LOS A through LOS F. The LOS results are based on average delay per vehicle, which correspond to the delay threshold values shown in Table 1. LOS A indicates the best traffic operation, with vehicles experiencing minimal delays. LOS F indicates an intersection where demand exceeds capacity, or a breakdown of traffic flow. An overall LOS A through D is generally considered acceptable by drivers in the Twin Cities Metropolitan Area. Table 1 Level of Service Criteria for Signalized and Unsignalized Intersections LOS Designation Signalized Intersection Average Delay/Vehicle (seconds) Unsignalized Intersection Average Delay/Vehicle (seconds) A ≤ 10 ≤ 10 B > 10 - 20 > 10 - 15 C > 20 - 35 > 15 - 25 D > 35 - 55 > 25 - 35 E > 55 - 80 > 35 - 50 F > 80 > 50