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Construction and traffic impacts

Slow Down - Road Work Aheas SignConstruction is estimated to start in 2027 and be completed in 2028. The work is being planned in stages to minimize impacts for the traveling public and local residents. We're sharing the plans and potential impacts below. These are what we anticipate, but we won't know the exact timing or the final staging plans until after the contractor is on board.

Each work zone in the project area will have varying levels of impact to traffic depending on specific work activities. Overall, you can plan for single lane closures, delays, noise and short-term detours.   

Larger impacts to traffic can be expected during the planned closures of local roads and OR 18 during the roundabout construction.

What we're doing and the potential impacts

Construction Staging Map

Automatic Flagger Assisted Device​We are widening the road to prepare for the new turn lanes at NE Stoller Road. Towards the end of this phase of work, we will permanently close NE McDougall Road. 

To do this work, you can expect:

  • ​Lane and shoulder closures.
    • Single lane closure on the OR 99W  is allowed nightly, Sunday night through Friday morning, between 7 p.m. and 5 a.m.​
  • ​Work zone controlled by flaggers or automated flagger assisted devices.
  • Stoller Road will close for up to 14 days at the OR 99W intersection to give crews the space to work safely. 
    • McDougall Road will serve as the detour during the closure. There are access points from McDougall Road to OR 99W nearby, so out-of-direction travel will be minimal. ​​​​​

Road Closed message signWe are moving the NE McDougall Road and OR 99W intersection west to make it easier for drivers to see oncoming traffic. We will also widen the south side of OR 99W to build a new turn lane and extend the existing turn lane to the new intersection.

​To do this work, you can expect:

  • ​Lane and shoulder closures.
    • Single lane closure on the OR 99W  is allowed nightly, Sunday night through Friday morning, between 9 p.m. and 5 a.m.​
  • ​Work zone controlled by flaggers or automated flagger assisted devices.​
  • NE McDougall Road access to OR 99W at this location to be closed for up to 14 days while the new intersection is built.
    • The existing McDougall Road will close permanently. Traffic will need to detour to use other intersections with OR 99W.​​

Roundabout signThe rou​ndabout construction will happen in stages to help minimize impacts to residents and people driving through the area.

Stages

#1 iconThe first step is to widen and pave the south side of OR 99W to create new lanes for traffic to use while we build the roundabout. Crews will remove the existing lights and traffic signals and install a temporary system to use during construction.

#2 iconTraffic will shift south onto the newly widened paved section. We'll remove the dedicated northbound right-turn lane on OR 99W and the McDougall Road connection will close permanently at the beginning of this stage. We'll place a temporary barrier near the center of the road to separate the crews from traffic. We'll construct about half of the roundabout during this stage, including temporarily widening the north side of the road for future stages.​

#3 iconOR 99W traffic will shift to the new alignment, partly on the new roundabout road and partly on temporary widening. A temporary connection to OR 18 and the new road on OR 99W will be constructed. Temporary barrier is required on both sides of the road during this phase to protect crews from traffic and keep drivers out of the work zone. Because the ground won't be level, we'll temporarily close OR 18 during this work.  

​During this stage, there will be two closures of OR 18Road Closed Sign.

  • OR 18 will close for up to 96 hours, or four days, between Sunday at 7 p.m. and Friday at 5 a.m. 
  • All through traffic will detour onto OR 99W through McMinnville and Lafayette during this closure. 
  • Local traffic may use alternate routes such as Lafayette Highway or Kreder Road.

#4 iconDuring the final stage, many miscellaneous elements will need to be completed to finish the roundabout. We will move traffic to fully use the roundabout. Crews will finish constructing any remaining crossings, sidewalks, separators and islands during this stage. We will remove any remaining temporary pavement and road widening. Crews will install permanent features like striping, signing and landscaping.​

​

Lane Closed Ahead SignOverall, during the stages, you can expect:

  • Single lane closures on the OR 99W and OR 18 nightly, Sunday night through Friday morning, between 9 p.m. and 5 a.m.​

We are planning to fully close OR 18 two times for up to four days at a time. When closed access to OR 18 from OR 99W will be restricted. Drivers can detour around the closure by using OR 99W.​

Detour Route ​Click on the image to enlarge.

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