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

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Project Banjo Traffic Study — Regional Analysis Addendum April 22, 2022 Page 11 Tria Distribution Trips generated were distributed throughout the study area based on the directional distribution shown in Figure 5, which was developed based on existing travel patterns, service area data provided the project team, and engineering judgement. The trip distribution also shows the site generated trips at each of the driveways serving the site during typical weekday conditions. The resulting year 2025 and year 2040 no build and build condition traffic volumes, including the peak season, are shown in Figure 6 through Figure 11. Note that the no build conditions include trips generated from the assumed adjacent developments, as well as the background growth rate applied to existing traffic volumes routed for the future transportation connections noted. The build conditions represent the no build conditions, with the proposed development traffic added. FUTURE INTERSECTION CAPACITY ANALYSIS To understand how intersection capacity is expected to change as the area develops, including the proposed development, a detailed intersection capacity analysis was conducted for each of the traffic forecasts scenarios. This analysis again leveraged Synchro/SimTraffic Software (version 11). Results of the future intersection capacity analysis are summarized in Table 6 by time period and scenario. Detailed information showing the average delays and queue length for each scenario are available upon request. The capacity analysis indicated that the study intersections can support the assumed adjacent and proposed developments under both year 2025 and 2040 conditions, including the peak season. With optimized signal timing (i.e., cycle lengths, phasing, and splits), all study intersections and movements are expected to operate at LOS D or better during the a.m., midday, and p.m. peak hours. However, the primary area of concern is the Main Street and 21st Avenue intersection, where the following queuing issues were identified: • Northbound queues along 21st Avenue from Main Street are expected to regularly extend beyond the north Gas Station driveway located about 90 feet from Main Street under year 2025 build conditions; these queues lengthen under each successive traffic forecast scenario • Southbound left -turn queues along 21st Avenue from Main Street are expected to extend between 300 and 335 feet starting under year 2040 no build p.m. peak hour conditions; these queues extend beyond the Bank access approximately 250 feet to the north A detailed summary of the Main Street and 21st Avenue intersection capacity analysis and pertinent queues by scenario is provided in "'': rl;. Detailed analysis results for each scenario are available upon request. Potential infrastructure considerations to address the intersection capacity/queuing issues noted, as well as other long-term considerations are noted in the following section. It is important to note that the I-35E / Main Street interchange reconstruction completed in 2011, and subsequent Main Street / 21st Avenue intersection projects in 2013 and 2014 added significant capacity within the area in anticipation of future development within the area.