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<br /> kLG---.; -':'3:, :....:.:..:.'=' ~'c; .:'::'.~LLr- ,-, ~.::..::.,j_. ::-__ :..J':'" :<:-'::..... ,-. .....;::. .....; <br /> ~({o Messrs. Zehring and Ringwald -4. AuguSt 5, 1997 <br /> . established 90 seconds as the maximum tolerable delay for northbound left turning <br /> motorists at the Round Lake Road intersection. <br /> Having established 90 seconds as the delay threshold, the northbound left turn traffic <br /> volume was increased in the ReS until the estimated delay was very nearly 90 seconds. <br /> Several iterations were necessary to determine the maximum volumes that could be added <br /> to the inbound and outbound turn movements and still maintain a maximum delay of 90 <br /> seconds for the northbound left turn. Assigning the inbound and outbound trips in <br /> proportion to the observed turn movements results in the peak hour turn movements <br /> shown in Figure 2. These turn movements represent the maximum turn movements that <br /> result in a threshold delay of 90 seconds at the current stop controlled intmection of <br /> Round Lake Road and Highway 96. <br /> The final step was to convert the additional trips which resulted in the maximum threshold <br /> delay into the amount of occupied floor area which will generate this number of trips. The <br /> proposed development floor area will be divided into 20 percent office space and 80 <br /> percent warehouse space. The table below shows the forecast number of weekday p.m. <br /> peak hour trips generated by 200,000 sq. ft. of development when fully occupied. <br /> Table of Weekday P.M. Peak Hour Trip Generationl <br /> Trips Inbound Outbound <br /> . Land Use Size!sa. ft.) Generated Trias Trios <br /> Office 40,000 95 16 79 <br /> Warehouse 160 000 118 41 77 <br /> Total 200,000 213 57 156 <br /> This trip generation scenario results in the maximum turn movements of Figure 2. Thus, <br /> we conclude that the current stop controlled intersection can accommodate the <br /> development and full occupancy of200,OOO sq. ft. of the Gateway Business Center. <br /> I The number of trips generated for ca<h land use (and the number inbound and outbound) are calculated <br /> from the rates published in Trip Generation, 5th Edilion, [nstitule of Trarnportation Engineer<. 1991. <br /> . <br />