CCP 02-26-2001 - Laserfiche WebLink

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flY i3S . 5.0 Roadway Improvement Measure for Existing Conditions Since an operational deficiency was found to exist under no-development conditions, improvement measures to address this deficiency were explored prior to the impact of the site generated traffic. In the analysis, it was assumed that the least costly improvement measures would be the most attractive to all parties involved. Therefore, potential improvement measures were analyzed in approximate ascending order of cost to implement. For example, changing traffic signal timing or left turn phasing is considered to be a low cost alternative, as it can be implemented with no construction or right-of-way acquisition. In contrast, addition of turning lanes, though it may yield the best traffic operational results, require land acquisition and construction measures in addition to traffic signal modifications. 5.1 Suggested Roadway Improvements The following and Figure 5.1-1 detail the roadway improvements required for acceptable traffic operation of existing conditions: . I. Re-designate the lane use for the west approach at the County Road E I Lexington Ave intersection. This should include one exclusive left turn lane, one shared though/left turn lane and one shared through/right turn lane. Currently only one left turn lane on the west approach exists, presenting delay and queuing issues. Re-designating the lane use would in affect allow for one more left turn lane, decrease delays and shorten the queue lengths. 2. Modify the existing traffic signal at County Road E and Lexington Ave (eastbound and westbound directions) to accommodate split phased operation. .. Split phase operation allows the east approach left, through and right turn movements to operate simultaneously as a protected movement for a designated amount of time. The west approach would operate in the same manner as the east, but would occur after the east approach movement has timed out. Split phase operation is necessary in order to allow a shared through/left turn lane use at this intersection. 5.2 Traffic Impacts of Suggested Roadway Improvements The LOS and queuing analysis was not performed for the a.m. peak hour, as the existing condition results did not present any problems. It is assumed and expected that with the implementation of the suggested roadway improvements, the key intersections would operate at least the same, if not better than existing. . The LOS computed for the p.m. peak hour with the suggested roadway improvement for each of the key intersections are shown in Table 5.2-1. The results show that the overall intersection LOS at County Road E and Lexington Ave continues to operate at a LOS C. Walgreen's Traffic Impact Study Draft Report Existing Conditions Improvements February 07, 2001 5-1