06-01-2020 Council Work Session Packet

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Jane Rose, Anoka County CSAH 34 (Birch St) Pedestrian Crossing Review and Analysis May 18, 2020 Page 5 Based on review of the proposed roundabout design the stopping sight distance is adequate for pedestrians crossing at each of the proposed crossing locations. Figure 3 in Appendix A shows the sight distance for each approach for the School Entrance/Tomahawk Trial intersection , and, Figure 4 in Appendix A shows the sight distance for each approach for the West Shadow Lake Drive intersection. Level of Service Analysis (Delay and Gap Acceptance): The Highway Capacity Manual (HCM) procedures were used for determining the pedestrian crossing Level of Service (LOS) and delay. LOS is generally deemed acceptable between LOS A and LOS D and unacceptable at LOS E or LOS F. Each crossing assumes a two-stage crossing with an ADA Compliant (min 4ft x 4ft) refuge landing. The analysis was conducted with and without standard pedestrian crossing signing and markings. Based on these conditions Table 1 below summarizes the level of service and delay at each crossing. The capacity analysis worksheets are included in Appendix C. Table 1 – Level of Service and Delay Summary Crossing Location Without Signing and Markings With Signing and Markings LOS Delay (sec/ped) LOS Delay (sec/ped) School Entrance/Tomahawk Trail West Approach C 15.4 C 13.9 School Entrance/Tomahawk Trail East Approach C 15.8 C 14.2 West Shadow Lake Drive West Approach C 15.8 C 14.2 West Shadow Lake Drive East Approach C 15.5 C 14.0 Pedestrian Safety Review: Using FHWA Pedestrian Safety guidance, marked crosswalk locations should be determined based on the traffic volume, speed, and roadway type. For each of the proposed crossing locations the following was assumed: • Two-lane roadway • ADT between 11,975 (existing) and 14,000 (2040) • Speed Limit of less than 30mph at the roundabouts. Based on this review it can be concluded that possible increases in pedestrian crashes could occur if crosswalks are added without other pedestrian facility enhancements. Therefore, it is recommended that if marked crosswalks are provided at any of the locations, other pedestrian crossing improvements should be considered.