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Traffic Study <br />Lexington Avenue Reconstruction <br /> <br /> <br />Alliant No. 118-0186.0 32 <br />April 18, 2019 <br />County Road E Improvements <br />Beyond the CR E intersection improvements detailed above, several others were also considered: <br />x County Road E Intersection <br />o Reconfigure SB approach to consist of separate left-turn / through / right-turn lanes <br />ƒ This improvement would prevent right-turning vehicles from being blocked by <br />queued through vehicles in a shared through/right-turn lane that would otherwise <br />prevent a right-turn on red maneuver. However, the flexibility offered by the shared <br />through/right-turn lane minimizes potential for lengthy southbound queues during <br />peak hours. <br />o Extend SB left-turn lane beyond railroad crossing <br />ƒ This improvement would provide left-turning vehicles more storage and avoid <br />through vehicle queues from blocking the left-turn lane. However, the minimal <br />operational improvement is offset by the safety risk of having another vehicle lane <br />crossing the railroad tracks (located approximately 250 feet north of CR E). <br />ƒ Recommend lagging the SB left-turn movement to allow left-turning vehicles <br />blocked by through vehicle queues to enter the left-turn lane prior to receiving a <br />protected green arrow. <br />4.3 Preliminary Alternatives Traffic Operations Analysis <br />A traffic operations analysis was conducted to evaluate the operational performance of the various <br />alternatives under forecast year 2040 traffic volumes. Since the p.m. peak hour exhibited the <br />poorest traffic operations under existing conditions, the p.m. peak hour was chosen for the <br />operations analysis of the various preliminary intersection alternatives. <br />The purpose of this preliminary analysis is to compare the performance of each alternative to aid <br />in the selection of a preferred alternative to be evaluated in greater detail. In addition, the traffic <br />operations analysis provides context to the need for intersection improvements based on <br />intersection capacity. The key measures of effectiveness evaluated include overall intersection <br />delay/LOS and approach delay/LOS. Table 9 provides a summary of the traffic operations analysis <br />under forecast year 2040 p.m. peak hour traffic volumes. <br />