02-18-1998 - Laserfiche WebLink

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Mr.Jim Ericson February 13, 1998 Page 2 analysis section. Of the 145 trip ends generated by Walgreen's,we calculate that 29 will be pass by trips and the remaining 116 will be new trips. In reviewing the distribution and assignment of the newly genera'ed traffic, we noted a error on the bottom portion of Figure 3 of the report. At the T.H. 10 access of Walgreen's, the westbound right turn movement is shown as 144. This number should be 14. Level of Service With the change in the trip generation rate and the pass by percentage, the Walgreen's development is expected to increase the volume through the intersection of T.H. 10 and County Road I by five vehicles per cycle (on average) during the p.m. peak hour. This is slightly higher than the three vehicles per hour stated in the Benshoof report. The net result is that there is a slight increase in delay for some of the movements and the intersection as whole but it does not change the overall level of service (LOS). As stated in the Benshoof report, the intersection will operate at an overcapacity level (LOS F) and the additional traffic is not expected to have a significant impact on the operation of the intersection. To verify the implied assumption that development was not driving the overcapacity situation at the intersection,we reviewed the level of service at the intersection with 1997 background traffic only, 1998 background traffic only and 1999 background traffic using an annual growthrate of 2.5 percent. This analysis showed that the intersection would begin to operate at an overcapacity level in 1999 even without development due to the large northbound through movement on T.H. 10. A summary of this analysis is attached. We reviewed the potential of adding capacity (lanes) to the County Road I approaches of the intersection. Adding lanes at these approaches would not significantly improve the level of service at the intersection. As noted in the Benshoof report, the T.H. 118/610 connector should help to alleviate congestion at this intersection. We estimated that a 10 percent reduction in the T.H. 10 through traffic would bring the intersection out of an overcapacity situation. We also reviewetLthe storage capacity for the westbound County I approach. We estimate that 200 feet of storage for queued vehicles is needed. Since the Walgreen's access on County Road I is located approximately 200 feet east of the T.H. 10 intersection, there may be a few cycles in the p.m. peak hour where the queue backs up to but not through the Walgreen's access. Site Plan Review We have reviewed the site plan and noted a few items: • A place for trash collection is not shown and could not be evaluated. • The County Road I access to the site shows the two lanes for outbound traffic as one through and one share left-turn and through lane. The lanes for the "T" intersection • should be designated as one left turn only lane and one right turn only lane. soot AAS t1 T7 f1Rb 7TO TVJ QT:OT Tx.T 4R/PT/7n