| Region 1 Traffic Signal Project: Unit 4 |
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| Project Information |
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Background
ODOT's Traffic Signal: Unit 4 project includes improvements at three signal locations in Region 1: Highway 43 at Greenwood Road/Breyman Avenue in Multnomah County; Highway 99E at Main Street in Oregon City; and Highway 217 southbound ramps at Allen Boulevard in Beaverton.
Projects
1. Highway 43 at Greenwood and Breyman (Multnomah County): SW Greenwood Road and SW Breyman Avenue intersect Highway 43 at nearly the same location, creating a single signalized intersection with overlapping turning movements. The existing configuration is very confusing to motorists and leads to some vehicles traveling on the wrong side of the street, increasing potential vehicle conflicts. This project proposes to upgrade the intersection to reduce driver confusion and minimize potential vehicle conflicts. Five alternatives for upgrading this intersection were identified. ODOT and Multnomah County has evaluated each of these alternatives and has selected a preferred alternative after receiving input from the general public.
The preferred alternative is for split signal phasing. With this alternative, the intersection signal phasing would be modified so that vehicles approaching the intersection from SW Greenwood Road and SW Breyman Avenue would not be allowed to enter the intersection at the same time. Right-turn on red travel would be prohibited as sight distance is limited at the intersection. Signing and striping modifications would be implemented to better direct vehicles into the correct travel lanes.
2. Highway 217 at Allen Boulevard (Beaverton): There is currently one traffic signal controller for the traffic signals at the Highway 217 northbound and southbound ramp ends. As part of this project, the signals would be updated by providing separate controllers for the two freeway ramp intersections. This would allow for improved signal coordination at the intersections.
The existing detector system at the intersection of the Highway 217 southbound ramp at Allen Boulevard consists of both microloops on the bridge structure and some regular detector loops. The existing detector system is to be replaced with a video detection system.
3. Highway 99E at Main Street (Oregon City): The existing signal poles located at the south and west corners of this intersection have been repeatedly struck and damaged by large trucks that frequent this area. This project proposes to reconfigure the signal poles and their locations so they are less likely to be struck and damaged by local truck traffic. Sight distance is limited so an advanced signal head must be provided for eastbound traffic on OR 99E.
Construction Schedule
The signal project is scheduled to go to bid on Nov. 19, 2009. Work on this one-year project could start as early as December 2009.
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| ODOT Contact Information |
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Mike Mason, ODOT Community Affairs
503-731-8246
Michael.W.Mason@odot.state.or.us
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