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<br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br /> <br />~_:~L~ ___ ~n".'.._._.'r"""..-" .~"-""'_"'~'___L.~ '" -- .- <br /> <br />int:.erc::harge, allClllin;;J direct aocess to I-35W for oort.hbourd arrl southbourrl <br />IOOtorists. 'Ihe camty Read DJClevelarrl intersection is currently controlled <br />by four-way stq) signs. Ramsey COUnty plans to upgrade the intersection in <br />1991 to aai cg>road1 laIV:$ to the west ani ~rth legs am traffic signal <br />control. <br /> <br />Me'I:hoaolOCN <br /> <br />Traffic was estimated for 1995 acxx>rdi.rg to the follC1lli.rg steps: <br /> <br />1. Backgrc:urrl traffic: Non-site traffic for 1991 was taken from the 1986 <br />:in::lirect sooroe pemit cg>lication. Backgrc:urrl traffic for 1995 was <br />estimated by adjustiIq the 1991 volUllES upward by three percent per <br />year. Average daily traffic (ADI') vollIlOO counts oon:h1cted by the City <br />of Roseville ani Ramsey COUnty between 1985 ani 1987 have sh<:Mn <br />annualized grcMth rates of one to two percent. However, because of the <br />anticipated redevelcpnent of at least sane peri{beral lard, the higher <br />three percent annual gJ:Oi\1th rate (CXIIpOlIl'ded) was selected to provide a <br />oonsezvative projection. <br /> <br />2. Trip Generation: site traffic was generated based on the size of the <br />devel~ ani st:an::1al.'d trip generation rates taken fram the 1987 <br />Institute of Transportation ED:]ineers (TIE) manual (See Table 2). <br /> <br />3. Trip DistribJtion: Traffic direction of approach am departure was <br />based an the pcp1lation arxl employnent densities in each Metropolitan <br />(U.]rcil Traffic Assigrnnent Zone (TAZ) within a 5- ani lO-mile radius of <br />the site. Traffic was 1:hen assigned to a highway or street servirq <br />that area as shown in ~ A. '1he percent of traffic assigrnnent <br />derived in this manner was then cx:mpared to traffic assignments <br />develq:ej for other stuiies in RDseville. f!he results were found to be <br />c:atparable. <br /> <br />4. Trip Assignment.: Trips !ran the site were assigned to the roadway <br />system based on travel tllne. they were added to the background traffic <br />to obtain an estimate of total traffic usiIq the roadway systeIn. I!hese <br />volumes are shown on the maps in ~ A. <br /> <br />capacity Analysis <br /> <br />An analysis of the roadway system. seIViIq the stu:iy area was perfonned in <br />order to establish the vehicle capacities of the surrourrlirq roadway system. <br />To detennine these capacities, all critical intersections were selected for <br />detailed capacity analysis. <br /> <br />Capacity analysis was perfontai for the peak ho.Jr an1 average eight-hour <br />periods of traffic flow. Intersections were detenni.ned to be operating at <br />level of savioe C or better in all cases. '!he results of this analysis are <br />presented in ~ B. <br /> <br />9 <br />