DWWe are building a three-lane extension of Century Boulevard between Main Street and Lois Street, including a new road segment between Main and Borwick streets. The project will also include a bridge over Rock Creek and a road realignment between Ariel and Lois streets to create the connection at SE Century Boulevard.
We are also building continuous sidewalks and bicycle lanes, adding street lights and storm drain improvements. Continuous sidewalk and bicycle facilities, street lighting, and storm drainage upgrades are also included.
Crosswalks will be installed north of Main Street at the same time for the City of Hillsboro.
Construction start (expected): Spring 2026
Construction finish (expected): Spring 2028
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Update
11/10/2025: We are waiting for our final permits and updating our rehabilitation and environmental restoration plans. Construction is delayed.
CPO 9 (Inactive)
Commissioner District 4
Funding
Cost Estimate: $43.1 million
Funding source: Major Streets Transportation Improvement Program (MSTIP 3e)
Studies
Prior events and comment opportunities
Open House: March 19-April 11, 2021
Open House: Dec. 12, 2019
Open House: Feb. 28, 2019
Project newsletters
Questions and answers
- Why will the Century Boulevard Extension between Main and Lois streets be built?
This project has been included in the city of Hillsboro’s Transportation System Plan (TSP) since 1999. It is one of four projects selected to increase access to jobs in the north part of the city and housing to the south:
- Complete the Century Boulevard (formerly 231st Avenue) corridor
- Widen Cornelius Pass Road
- Complete Brookwood Parkway/Shute Road corridor
- Enhance access to US 26 via Jackson School Road.
Traffic models show that 185th Avenue, Cornelius Pass Road and Brookwood Parkway are not enough to meet future travel demands of the area.
Century Boulevard is funded through the Major Streets Transportation Improvement Program (MSTIP 3e).
Public feedback was collected during phase of project selection and design:
- How will the Century Boulevard Extension improve livability?
The connection reduces vehicle miles traveled, which impacts greenhouse gas emissions. Residents living south of Main Street travel a significant distance to reach a north/south connection (Brookwood Parkway or Cornelius Pass Road).
It also provides a needed bicycle connection to Main Street, decreasing travel time for those who walk their bikes through Noble Woods.
- What will the traffic impact be when the Century Boulevard Extension opens?
Models project traffic on Century Boulevard between Main Street and Cornell Road will increase by 15-20% when the bridge opens. This is about one additional vehicle per minute in each direction.
When South Hillsboro is fully built traffic on this section of road is expected to be 25-30% more than in 2019, about two additional vehicles per minute in each direction.
- Will a crosswalk to the Noble Woods Park entrance on SE Century Boulevard be built as part of the Century Boulevard Extension project?
The impacts to the park entrance are being coordinated with the City of Hillsboro Parks & Recreation Department. A Rapid Flashing Beacon will be installed at Borwick Street.
- What will the noise impact of the proposed road project be?
A noise study was completed and considered the finalizing the project design:
- Will there be light pollution due to this road project?
The Dark Sky-compliant LED streetlights will be at a frequency that will not disturb nocturnal animals.
- How many trees will be removed for the Century Boulevard Extension? What environmental rehabilitation is planned?
A total of 47 trees are expected to be impacted by the project:
- 12 trees between 6-12 inches in diameter.
- 30 trees between 12-24 inches in diameter.
- 5 trees larger than 24 inches in diameter.
We will install at least 60 trees and shrubs in the project area. We are coordinated with the Hillsboro Parks & Recreation Department (HPRD) to plant additional trees in front of Noble Woods Park. We are investigating additional planting locations.
- Does the Century Boulevard Extension Projects impact wetlands?
A wetland survey has been conducted and sent to the Department of State Lands for review. There is a possibility that the project may not impact any wetlands, but it could have minimal wetland impacts.
Any impacts will be mitigated within the existing drainage basin.
- What will be in place to deter homeless individuals from camping under the new bridge?
Possible deterrents are being investigated.
- What will be built on the vacant lot on SE Century Boulevard?
Development is unrelated to the road project. For more information, contact Hillsboro’s Planning Department at 503-681-6153.
- Will the Century Boulevard Extension Project effect the function of the light rail and Cherry Drive intersections with Century Boulevard?
Traffic signals on Century Boulevard at the light-rail crossing and at Cherry Drive are a single system. The signals respond together to pedestrians, trains and vehicles to prevent safety issues.
Hillsboro updated the traffic signals in 2019 to allow for more complex timing. The city will modify the timing with changes in traffic volume. The city is aware of traffic backups when two light-rail trains cross Century Boulevard in a short period of time and is working with TriMet to minimize backups safely.
- In addition to Century Boulevard Extension, is the County or City planning other improvements for north-south traffic?
Hillsboro and Washington County are making improvements to encourage commuters to use Cornelius Pass Road and Brookwood Avenue.
- Will the Century Boulevard Extension Project bring more traffic and make crossing Century Boulevard more difficult? Is the City planning any crossing enhancements for pedestrians?
Hillsboro must follow federal rules and state laws when determining where to install traffic lights and crossing enhancements, such as marked crosswalks and Rectangular Rapid Flashing Beacons (RRFB). An engineering study is completed to determine safety improvements.
A traffic signal will be installed at the SE Lois Street and Century Boulevard intersection as part of the Century Boulevard Extension.
A crosswalk with a Rectangular Rapid Flashing Beacon (RRFB) will be installed at Century Boulevard and Borwick Street intersection.
Hillsboro is in discussion with the Oregon Department of Transportation (ODOT) to install a traffic signal at the SE Imlay and Tualatin Valley Highway intersection.
Intersections with Century Boulevard studied, but not meeting the requirements for enhancements are:
- NE Dogwood Street
- NE Oelrich Street
- SE Francis Street
If conditions change, improvements will be are prioritized alongside other locations throughout the city.
- Will neighborhood traffic increase due to the Century Boulevard Extension Project? When will sidewalks be built in the Orenco Townsite Area?
The Orenco Townsite Area falls within the Orenco Station Community Planning Area which has community-specific development regulations and design standards that were developed with involvement of community members. The purpose of the regulations and standards is to conserve the historical and cultural significance of the area of the original community of Orenco preserving and restoring the plat plan and site layout of the original 1908 community and its 1911 addition.
For more information, contact Hillsboro’s Planning Department at 503-681-6153.
- Will more traffic lanes be added to Century Boulevard between Main and Lois streets in the future?
The TSP does not call for any additional lanes, however dedicated turn lanes could be added at signalized intersections if needed to improve traffic flow.
Contact(s)
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Capital Project Services
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