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1 <br /> • <br /> Sheldon H.S. Traffic Operations <br /> The average delay per vehicle associated with each level of service is as follows: <br /> Level of Service Average Delay per Vehicle <br /> A <_ 5 seconds <br /> B > 5 and s 10 seconds <br /> C > 10 and s 20 seconds <br /> D > 20 and _s 30 seconds <br /> E > 30 and s 45 seconds <br /> F > 45 seconds <br /> Level of service calculations were performed for the afternoon peak hour at both access points. <br /> The computer program Intersim, developed by Innovative Transportation Concepts was used to <br /> calculate the levels of service. At unsignalized intersections, a level of service is calculated only <br /> for movements which have to yield the right -of -way. <br /> The level of service analysis indicates all movements at the west access currently operate at LOS <br /> `A' or `B'. <br /> The southbound approach at the east access currently operates at LOS `D -E' during the studied <br /> hour. The northbound approach operates at LOS `C' and left turns from Willakenzie Road <br /> currently operate at LOS `A' during this hour. It should be noted that the above levels of service <br /> occur for less than one hour, immediately after school dismissal, and the studied intersections <br /> operate considerably better outside of this period. • <br /> Considering the lengthy queues and poor level of service at the east access, it is recommended <br /> separate right and left turn lanes be delineated exiting the school as shown in Figure 3. A level of <br /> service calculation was performed to determine the improvement gained by delineating separate <br /> turn lanes. The results of this calculation indicate the right turn level of service would be <br /> improved to LOS `B' and the left turn and through movements would continue to operate at LOS <br /> `D -E'. <br /> On -site Circulation <br /> In order to improve on -site circulation during peak periods, additional pick -up /drop -off space <br /> near the main school entrance is recommended as shown in Figure 3. This improvement is <br /> expected to reduce congestion directly in front of the school and improve pedestrian facilities as <br /> well. A yield sign should be installed where the circulation loop terminates at the west access to <br /> minimize the risk of accidents at the east access. <br /> Branch Engineering - Page 4 <br />