EWEB/New Triad Hospital Relocation Transportation Analysis Report

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1~I~S ,~~~~i~tes '1"l,~:i',ISt'i~1`r~`"/y"l iC~i' SC, r..~.a'"(Ii)P~IS As Table 4 indicates, the proposed project creates a signalized intersection at Broadway/Patterson Street, but does not change the level of service at any of the signalized or stop control intersections (even though the delay at these intersections slightly increases with the project in place). The V/C ratios also slightly increase at most of the signalized intersections. Of particular concern is the newly (proposed) signalized intersection of 8th Avenue/Mill Street. This intersection is forecasted to operate at a V/C ratio of 0.98 during the AM peak hour and the project increases this V/C ratio to 0.99. Mitigation strategies at this intersection would be significant to achieve more optimal traffic operations. 2007 PM PEAK The following summarizes the no-build and build analysis for the 2007 PM peak hour. Table 5 summarizes the traffic operations for these scenarios during the PM peak hour. Table S ~ 1 2007 PM Peak Hour No-Build and Build Tra ac O erations ' Study Intersection 2007 PM No-Build 2007 PM Build Unmitigated Delay LOS V/C Delay LOS V/C i ~ # Ti~crfftc Sig~zal Control 4 6th Avenue/High Street ~ 32.3 C 0.85 32.7 C 0.85 5 7th Avenue/High Street 15.3 B 0.78 15.4 B 0.78 --; 6 8th Avenue/Mill Street 35.6 D 0.97 36.1 D 0.98 9 Broadway/Mill Street 10.8 B 0.72 11.0 B 0.73 11 Broadway/Hilyard Street 18.7 B 0.73 19.5 B 0.64 # Two-rvav STOP Coctlral 8 8th Avenue/Hilyard Street I A/F - 10 Broadway/Patterson Street` F/- 15.5 B 0.95 # All-wrty STOP Cotzty~ol 1 3rd Avenue/Mill Street A A 2 4`h Avenue/Mill Street A A 3 4`h Avenue/High Street B B 7 8th Avenue/Ferr Street A A Delay Average vehicle delay in seconds for all tnovetnents at signalized intersection. LOS Level-of-service. "A/A" refers to level of service of left turning traffic from major street and the average level of service of traffic turning from the minor street onto the major street. "A" refers to highest average level of service for all approaches at all-way stop controlled intersections. V/C Highest calculated volume-to-capacity ratio for individual movements at intersection. * No minor street left turn. The PM peak hour has many of the same operational problems that the AM peak has. Similar capacity constraints exist at the signalized intersection of 8th Avenue/Mill Street. The two unsignalized two-way stop controlled intersections with minor movement LOS F under the no- build condition now operate at acceptable conditions through the grad separation and the new proposed signal. The intersection of 8th Avenue/Hilyard Street does meet PM peak hour signal warrants. The all-way stop controlled intersection of 4th Avenue/Mill Street decreases in LOS j. from A to B, however this is still within acceptable traffic operations. ' Eugene Triad Hospital Relocation Analysis Page 14 of 17