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15
City of Pleasanton
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CITY CLERK
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AGENDA PACKETS
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2018
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011618
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1/11/2018 2:43:11 PM
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CITY CLERK
CITY CLERK - TYPE
AGENDA REPORT
DOCUMENT DATE
1/16/2018
DESTRUCT DATE
15Y
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little to reduce the increased pedestrian delay that is created with the vehicle focused <br /> coordination. <br /> Alternative 3 includes the vehicle focused signal coordination in Alternative 1 and also <br /> returns the Iron Horse Trail to a single stage crossing as it was originally constructed in <br /> 2014. This alternative showed 116 seconds of corridor delay (some vehicle delay <br /> returns compared to Alternative 2 due to the longer pedestrian crossing time). The <br /> pedestrian delay would still be at an unacceptable time of 62 seconds. <br /> Staff does not recommend any of the Alternatives analyzed as part of the Owens Drive <br /> review effort. Alternatives 1, 2 and 3 all reduce corridor delay, but increase pedestrian <br /> delay. <br /> Pedestrian Safety <br /> In the three years that the City has operated the Iron Horse Trail pedestrian traffic <br /> signals, field observations have shown that extending the wait time beyond 60 seconds <br /> significantly reduces the pedestrian's willingness to wait for the pedestrian crossing <br /> indication. Even at the current operational timing of 45 seconds, pedestrians are <br /> observed pressing the button but crossing without the signal as it approaches the 45 <br /> second mark, which is a safety concern. Alternatives 1, 2 and 3 all increase the <br /> pedestrian crossing time beyond 60 seconds and are not recommended for this reason. <br /> Evolving Technology—Adaptive Timing <br /> Traffic signal technology continues to evolve. Staff has been interested in piloting an <br /> adaptive timing approach instead of fixed signal timing. An "adaptive" system will allow <br /> the traffic signal controllers to respond to the one or two cycles per day that result in <br /> traffic queues in excess of eight vehicles. During this time the system will extend the <br /> "green time". During all other times of day, the adaptive system will be responsive to <br /> both vehicle and pedestrian volume and coordinate "platoons" of vehicles allowing <br /> pedestrians to cross between the platoons of vehicles. <br /> Our traffic signal system is not currently capable of coordinating signals by any other <br /> means than that of a fixed time. <br /> The software/hardware to operate an adaptive system is not currently owned by the City <br /> of Pleasanton and the cost of a 2-intersection adaptive system is around $90,000. The <br /> City has been exploring the possibility of installation of an adaptive system on the <br /> Bernal Avenue corridor and has applied for grant funding, but has been unsuccessful in <br /> the grant process. Owens Drive could be another good pilot location for this technology <br /> and staff will add this location to our grant application efforts going forward. <br /> RECOMMENDATION <br /> Staff recommends no additional changes to Owens Drive between Willow Road and <br /> Hacienda Drive at this time. The two-stage crossing reconstruction (summer 2017), <br /> combined with the modified signal timing in this corridor provides a balanced approach <br /> to motor vehicle, pedestrian, and bicycle needs in the TOD area. Staff will continue to <br /> Page 7 of 8 <br />
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