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<br />Table 6. presents the torecasted volumes tor all the tested alternates. The <br />table shows the volume that would use an alternate it that crossing were added <br />to the tour ex1st1ng crossings. The tratt1c that would use the ex1sting <br />bridges 1s also shown tor each cond1tion where a new bridge is tested. The so <br />called Base or "no bul1d" prov1des COIDPar1son tor trip demand changes as each <br />alternate1s tested. Except tor alternate 11 wh1ch 1& in the heavy 1-6911 <br />tratt1c corridor, demand at the new locat1ons is below 20,000 trips a day or a <br />volume easl1y handled by a tour lane br1dge. The only a1gn1t1oant rel1et ot <br />tratt1c at 18 169 1s when the br1dge 5 and 6 alternates are tested. <br />The projected (year 2000) tratt1c analys1s 1nd1cated tbat trips over the <br />H1ss1sa1pp1 R1ver between 18 101 and 1-6911 would double the 19811 demand. Total <br />dal1y orossings on three bridges in 19811 1iere 150,700. Forecasted demand <br />ranged trom 288,000 with the tour reg10nal bridges to 298,500 wh1ch included a <br />br1dge at 73rd Avenue. Adding anyone alternat1ve crossing to the computer <br />analys1s increased total trip demand estimates over the base or "no build" <br />assumpt10ns (the four regional bridges). <br /> <br /> <br />18 <br /> <br />~ <br /> <br />