Laserfiche WebLink
<br />lengths ranging from 75 seconds to 100 seconds. <br />th <br />The intersection of 6 Avenue/Chambers Street has a protected left-turn phase for northbound and the <br />th <br />intersection of 7 Avenue/Chambers Street has a protected left-turn phase for southbound. These <br />intersections currently operate with lagging left-turn phasing. It was determined that the existing phase <br />sequencing is the most efficient way to operate the signals, since the lagging left-turn sequence allows for <br />some progression along north and southbound Chambers. <br />thth <br />It was determined that the intersections along West 6 and 7 Avenue between Garfield and Chambers <br />currently operate efficiently given the existing conditions. No changes to the signal timings are <br />recommended at this time. <br />Recommendations <br />TH <br />WEST 11 AVENUE <br />Cycle Length <br />th <br />Vehicle travel times, delay and stops can be reduced along the West 11 Avenue corridor by implementing <br />new coordinated signal timings between City View Street and Terry Street. During the PM Peak, breaking <br />the corridor into two systems and operating with a cycle length of 100 seconds from City View Street to <br />Bailey Hill Road and a 110 second cycle length for the signals between Bertelsen Road and Terry Street <br />results in improved operation. During the AM Peak, a cycle length of 90 seconds is estimated to provide <br />the largest improvement. Field implementation may find that a break in the system between Bailey Hill <br />Road and Bertelsen Road (and two different cycle lengths) may serve the traffic more efficiently in the AM <br />Peak. In either case, the system performance measures show an improvement in the corridor operations if <br />new coordinated signal timings are installed from City View Street to Terry Street. <br />Left-Turn Phasing <br />Additional benefit can be realized if the left-turn phasing is modified along the corridor at selected <br />locations. Changing the existing doghouse signal heads at the intersections from City View Street to the <br />Fred Meyer driveway to four-section flashing yellow left turn heads will allow lead/lag phasing operations <br />without the left-turn trap (not possible with the existing doghouse head). <br />THTH <br />WEST 6 AVENUE/7 AVENUE <br />thth <br />Based on our analysis, it was determined that the intersections along West 6 and 7 Avenue between <br />Garfield and Chambers currently operate efficiently given the existing conditions. No changes to the signal <br />timings are recommended at this time. Further study would be required to evaluate signal timing <br />improvements for the larger signal system, which may suggest changes to the system boundaries, cycle <br />length, and/or phase sequences that would improve traffic operations. Additional field observation and <br />discussions with the City are recommended to further study the operation of this grid of signals with <br />relation to the signal to the east. <br /> <br /> <br /> <br />th <br />West 11 Avenue Corridor Study September 4, 2009 <br />City of Eugene P07265-003-000 <br />57 <br />