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CCP 02-26-2001
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CCP 02-26-2001
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<br />flY <br />i3S <br /> <br />. 5.0 Roadway Improvement Measure for Existing Conditions <br /> <br />Since an operational deficiency was found to exist under no-development conditions, <br />improvement measures to address this deficiency were explored prior to the impact of the <br />site generated traffic. <br /> <br />In the analysis, it was assumed that the least costly improvement measures would be the <br />most attractive to all parties involved. Therefore, potential improvement measures were <br />analyzed in approximate ascending order of cost to implement. For example, changing <br />traffic signal timing or left turn phasing is considered to be a low cost alternative, as it <br />can be implemented with no construction or right-of-way acquisition. In contrast, <br />addition of turning lanes, though it may yield the best traffic operational results, require <br />land acquisition and construction measures in addition to traffic signal modifications. <br /> <br />5.1 Suggested Roadway Improvements <br /> <br />The following and Figure 5.1-1 detail the roadway improvements required for acceptable <br />traffic operation of existing conditions: <br /> <br />. <br /> <br />I. Re-designate the lane use for the west approach at the County Road E I <br />Lexington Ave intersection. This should include one exclusive left turn lane, <br />one shared though/left turn lane and one shared through/right turn lane. <br />Currently only one left turn lane on the west approach exists, presenting <br />delay and queuing issues. Re-designating the lane use would in affect <br />allow for one more left turn lane, decrease delays and shorten the queue <br />lengths. <br />2. Modify the existing traffic signal at County Road E and Lexington Ave <br />(eastbound and westbound directions) to accommodate split phased operation. <br />.. Split phase operation allows the east approach left, through and right turn <br />movements to operate simultaneously as a protected movement for a <br />designated amount of time. The west approach would operate in the same <br />manner as the east, but would occur after the east approach movement has <br />timed out. <br />Split phase operation is necessary in order to allow a shared through/left <br />turn lane use at this intersection. <br /> <br />5.2 Traffic Impacts of Suggested Roadway Improvements <br /> <br />The LOS and queuing analysis was not performed for the a.m. peak hour, as the existing <br />condition results did not present any problems. It is assumed and expected that with the <br />implementation of the suggested roadway improvements, the key intersections would <br />operate at least the same, if not better than existing. <br /> <br />. <br /> <br />The LOS computed for the p.m. peak hour with the suggested roadway improvement for <br />each of the key intersections are shown in Table 5.2-1. The results show that the overall <br />intersection LOS at County Road E and Lexington Ave continues to operate at a LOS C. <br /> <br />Walgreen's Traffic Impact Study <br />Draft Report <br /> <br />Existing Conditions Improvements <br />February 07, 2001 <br /> <br />5-1 <br />
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