Planning Commission Agenda and Packet 2025 03 13

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King Soopers 142 Louisville, CO II. Background Information Study Area The study area was determined by a review of intersections that would experience a significant portion of turning movement volumes generated by the site. As such, the traffic study focuses primarily on the following intersections: Study Intersections • Centennial Pkwy & Century PI • Centennial Pkwy & N Site Access • Centennial Pkwy & McCaslin Blvd • E Site Access & McCaslin Blvd • Dillon Rd & McCaslin Blvd • Dillon Rd & S Site Access • Dillon Rd & Century PI Study Assumptions For purposes of this analysis only, the proposed use was assumed to be built and occupied in one distinct phase. It was assumed that the use would be built and operational in study year 2026. A long-term analysis of 2045 is also provided. Study Methodology Synchro software version 12 was used to evaluate levels of service at each of the study intersections during the weekday AM and PM peak hours. Synchro is a macroscopic model used for optimizing traffic signal timing and performing capacity analyses. The software can model existing traffic signal timings or optimize splits, offsets, and cycle lengths for individual intersections, an arterial, or a complete network. Synchro allows the user to evaluate the effects of changing intersection geometrics, traffic demands, traffic control, and/or traffic signal settings as well as optimize traffic signal timings. The levels of service reported for the signalized and unsignalized intersections analyzed herein were taken from the Hiahwav Capacity Manual (HCM) 7'h and reports generated by Synchro. Level of service descriptions are included in Appendix B. A default percent heavy vehicle (%HV) factor of 2% was used for all movements in the study area. Existing Roadway Network Regional access to the subject site is provided by McCaslin Blvd, and local access is provided via Centennial Pkwy/Cherry St and Dillon Rd. Figure 2-1 depicts existing lane use and traffic controls in the vicinity of the subject site. The following provides a description of each of the roadways within the study network. McCaslin Blvd McCaslin Blvd is constructed as a six -lane median divided section with turn lanes at major intersections. The posted speed limit is 35 mph in the vicinity of the subject site. The roadway functions as an arterial and provides north -south connection through the County and connection to Hwy 36 to the south. The intersections with Centennial Pkwy and Dillon Rd operate under signalized control. Galloway & Company, Inc. 12