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TdIO~t Mr Joshuo Pack, P.E Transponatlon May 29, 2008 Consuhantt Poge 8 All study intersections are expected to operate at LOS D or better under all study scenarios, except for the Valley Avenue /Santa Rita Road intersection, which is expected to operate unacceptably at LOS E under Existing Plus Approved Project Conditions during the p.m. peak hour. The LOS E is below the current acceptable City LOS threshold of LOS D or better and does not include Ironwood project traffic. Under Existing plus Approved Project plus Project Conditions, all intersections are expected to remain operating at the acceptable City LOS threshold, except the Valley Avenue /Santa Rita Road intersection, which is expected to continue operating at LOS E during the p.m. peak hour. However, this below-standard level of service is almost entirely due to current traffic levels, as well as background traffic growth from City approved projecu. Furthermore, Ironwood project traffic adds a very small overall average delay of I.6 seconds to the Valley Avenue /Santa Rita Road intersection. TJKM explored potential measures for mitigating the LOS E condition at the Valley Avenue /Santa Rita Road intersection. The current City of Pleasanton General Plan recommends a buildout lane geometry at this intersection that includes triple left turn lanes on the southbound Santa Rita Road approach (see Figure 2). Under this mitigation, the addition of a third left turn lane to the southbound approach resulu in an acceptable LOS D at the intersection under both Existing Plus Approved Project and Existing Plus Approved Project Plus Project Conditions. Table II shows the analysis resulu for this mitigation measure. Table 11: Intersection Level of Service -All Conditions Exising Conditions Exlrtrng Plus Approved Existing Plus Approved Conditions Plus Project Condition ID Intersection Control A.M. Peak P.M. Peak A.M. Peak P.M. Peak A.M. Peak P.M. Peak Hour Hour Hour Hour Hour Hour Delay LOS Delay LOS Delay LOS Delay LOS Delay LOS Delay LOS Valley Avenue /Santa Rim Signal 33.5 C 54.4 D 30.1 C 69.6 E 30.1 C 71 2 E I Road . Mitigatlon (Add 3rd Southbound left turn lane) _ - ~ - 29.2 C 38.1 D 29.2 C 38.6 D 2 Valley Avenue / Kolln Signal 17.6 B I I.I B 13.8 B 9.5 A 13.9 B 9 5 A Sweet . 3 ~nl ey Avenue /Quarry Signal 6.5 A 16.3 B 6.2 A 10.7 B 6.2 A 9 10 B e . 4 Valley Avenue I Busch Roa Signal 12.0 B 6.8 A 13.4 B 6.8 A 13.8 B 7.7 A S Busch Road /Ironwood Signal 12.4 B 13.2 B 9.8 A 1 I.I B 9 7 A 10 2 B Drive . . 6 Boulder Street /Valley Signal I I.I B I S.2 B 11.8 B I S. I B 11.9 B 15 4 B Avenue . 7 Sanley Boulevard / Valley Signal 51.5 D 42.6 D 36.9 D 44.2 D 37.2 D 44 7 D Avenue . Notes: Delay =Average control delay for overall intersection in seconds per vehicle LOS =Level of Service for overall intersection Bold indicates delay and LOS below City sandards