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Project Details

I-405: Ramps Project

Construction Phase

Region 1: Portland metro and Hood River County (Portland, Multnomah)

ODOT is repairing and replacing a number of joints on the freeway ramps along Interstate 405.
Construction began March 2019 and lasts through the fall of 2020. ​​​​​​​​​​​​​​


Traffic Impact

The following ramp will close 24/7 from 8 p.m., Friday, June 21 to 10 a.m., Monday, June 24.

  • I-405 north off-ramp to North Kerby Avenue. 

Signs will direct travelers to detours below.

The previously scheduled weekend ramp closure of I-405 north to North Kerby Avenue on June 14 - June 17 has been postponed to Friday, June 21. 


  • Merge left onto I-5 south.
  • Take the Broadway/Weidler/Moda Center off-ramp (Exit 302A).
  • Keep left and follow signs for Convention Center/Lloyd Center.
  • Head straight onto N Vancouver Avenue.
  • Turn left onto N Weidler Street.
  • Turn left onto N Williams Avenue.
  • Turn left onto N Stanton Street to access Legacy Emanuel or head straight to continue to N Cook Street.

Saturday, June 15 - Saturday, June 22

  • Single lane closures on I-405 north off-ramp to N. Kerby and N Cook / N Kerby on-ramp to I-405 south from Monday, June 17 to Thursday, June 20 from 8 p.m. to 6 a.m. 
  • I-405 north right lane closed across the Fremont Bridge from 8 p.m., Friday, June 21 to 10 a.m., Monday, June 24.
  • Single lane 24/7 closure on N Kerby / N Cook on-ramp until fall 2020.

A separate project is inspecting areas of I-405 and the Fremont Bridge not included in the construction of the I-405 Ramps Project.

Nighttime closures of I-405 and ramps for inspections:

  • The full bottom deck of I-405 north on the Fremont Bridge and the ramp from U.S. 30 east to I-405 north will close nightly from 10 p.m. to 5 a.m. on Thursday, June 13 through Saturday, June 15.

The ramp from U.S. 30 east to I-405 south will close 24/7 for 11 days from 8 p.m., Friday, July 19 to 10 a.m., Monday, July 29. Signed detour routes will direct drivers (shown on map below).

During the closure, I-405 and the Fremont Bridge will remain open.


U.S. 30 East to I-405 South Detour Route:

  • Take I-405 north to I-5 south.
  • Follow I-5 south to I-405 north or to U.S. 26 west.


Multnomah County is improving a five-mile stretch of NW Cornelius Pass Road. From early July to mid-September, Cornelius Pass Road will close to all traffic between U.S. 30 and NW Germantown Road.

The Cornelius Pass Road closure overlaps with the 11-day closure of the ramp from U.S. 30 east to I-405 south. During this closure, trucks that typically use Cornelius Pass Road should follow posted detour signs to I-405 north and I-5 south (detour shown above).

Visit for more information.

Check​​ for 24/7 traffic impacts in the Portland metro region and throughout Oregon.


This work will impact traffic on multiple freeways including I-405, U.S. 30, Interstate 5 and U.S. 26. The closures (shown on the maps below) are needed to maintain a safe work zone for the traveling public and construction staff. Significant traffic delays and congestion are expected.

Traffic impacts include: 

  • Nighttime single and double lane closures throughout the project area.
  • Weekend daytime single lane closures throughout the project area.
  • Nighttime and around-the-clock weekend closures, lasting until 10 a.m. Mondays, of on- and off-ramps (detailed on map below). 
  • Full 24/7 closures of U.S. 30 east to I-405 north (18 days) and U.S. 30 east to I-405 south (11 days).
  • Closures of sidewalks, lanes and parking on local roads under I-405.

Ramp and Lane Closures

Multiple weekend and overnight closures of on- and off-ramps and lanes will take place during construction. At times, multiple lanes on I-405 may close, leaving freeway traffic to share one lane in some sections.

Approximately 25 weekend closures* of on- and off-ramps and lanes are expected in the project area, along with frequent nighttime closures of each ramp. Night work is needed in order to minimize traffic impacts during the day.

Around-the-clock weekend closures will start as early as 8 p.m. on Fridays and will end by 10 a.m. on Mondays for each of the ramps shown. Multiple on- and off-ramp closures may happen at the same time. Dates for each weekend closure will be posted on this website in advance.

Impact on Local Roads

During construction, local roads, sidewalks and some parking spots under the elevated parts of I-405 may close when work occurs overhead. Drivers can follow signed detours. Sidewalk detours will be signed and accessible to people with disabilities.

Interstate Southbound Closure

For approximately 10 nights, North Interstate Avenue will close to southbound vehicle traffic from south of the Kaiser Permanente Building to North Knott Street. TriMet MAX service should not be interrupted. 

North Interstate Avenue will remain open to bicycles and pedestrians until North Graham Street. 

* This number could change due to weather or other conditions​​.​​​​​​​

Construction Impacts

Construction Noise

Periodic daytime and nighttime noise will take place, and those working or living in the area may hear the noise. 

Noise will come from heavy equipment, construction trucks, the beeping noise when vehicles are in reverse (a requirement by the Occupational Safety and Health Administration), and equipment such as concrete saws, drills and jackhammers. 

ODOT will apply construction noise mitigation measures to reduce noise impacts to surrounding neighbors. 

Use the 24/7 nighttime noise hotline to reach a live person to discuss any noise concerns: 833-840-1107.


March 2019 - Fall 2020



ODOT is repairing and replacing a number of freeway joints on the elevated sections of Interstate 405 on either side of the Fremont Bridge and on the ramp from I-405 north to U.S. 26 west. 

These repairs will improve the condition and maintain the long-term safety and use of this heavily traveled freeway.
Work includes:
  • Replacing or repairing forty-two freeway joints on I-405.
  • New concrete surfaces near replaced joints and on these three sections of freeway ramps:
    • U.S. 30 east to I-405 north
    • U.S. 30 east to I-405 south
    • I-405 north to U.S. 26 west​
Click on the image below to review the traffic impacts: nighttime, weekend and extended ramp closures.​



I-405 | ​Approach ramps east and west of the Fremont Bridge.

Cost and Funding


Additional Information

For Americans with Disabilities Act or Civil Rights Title VI accommodations, translation/ interpretation services, or more information call 503-731-4128, TTY 800-735-2900 or Oregon Relay Service 7-1-1.

¿Habla ustéd español? Podemos proveer la información en esta publicación en español. Para recibir la información en español, por favor llamé al 503-731-4128.

Contacts & Media

Project Map


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Project Contacts

Community Affairs Coordinator
Lili Boicourt

Community Affairs Coordinator
Katelyn Jackson

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Last Updated

6/14/2019 11:00 AM

Project Number


Project Documents

Related documents to this project
I-405-Project-Area-Map-19533.pdfI-405 Ramps Project: Map of project area
I-405-Ramps-Fall-Newsletter-19533.pdfFall 2018 Newsletter detailing the traffic impacts: nighttime, weekend, and extended ramp closures.
I-405-Ramp-Closures-East-West-19533.pdfI-405 Ramps Project: East side and west side closures
I-405 Ramps Project_Spring Newsletter_19533.pdfSpring 2019 Newsletter detailing the traffic impacts: nighttime, weekend, and extended ramp closures.
May 10_N Greeley and I-405 North to I-5 South Closure and Detour Factsheet_19533.pdfMay 10 Ramp Closures and Detours Fact Sheet
May 3_I-405 North to I-5 South Closure and Detour Factsheet_19533.pdfMay 3 Ramp Closures and Detours Fact Sheet
11-day Closure U.S. 30 east to I-405 south Detour Factsheet_19533.pdfDetour information for 11-day Closure U.S. 30 east to I-405 south.
June 14_I-405-North-off-ramp-to-Kerby_Closure-and-Detour-Factsheet-19533.pdfJune 14 Ramp Closures and Detours Fact Sheet

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