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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

Saturday, August 17 through Saturday, August 24

  • Nighttime lane closures on mainline I-405 south and I-405 north 8 p.m. to 5 a.m. weeknights, until 7 a.m. Saturday and 8 a.m. Sunday. 

  • Periodic nighttime lane or full ramp closures on the following ramps from 8 p.m. to 5 a.m. Monday through Saturday nights:
    • I-405 north ramp to U.S. 30 west.
    • I-5 south ramp to I-405 south.
    • Glisan Street on-ramp to I-405 north.
    • Couch Street on-ramp to I-405 north.
    • ​Kerby/Cook on-ramp to I-405 south.

  • Single lane 24/7 closure on North Kerby / North Cook Avenue on-ramp until fall 2020. 


  • Cornelius Pass Road will close to all traffic between U.S. 30 and NW Germantown Road unitl late September. Trucks will follow U.S. 30 to I-405. Visit​ for more information. 

The 11-day closure of the ramp from U.S. 30 east to I-405 south originally scheduled to begin Friday, July 19 ​has been postponed. We have not rescheduled the closure. 

Travelers should expect nighttime closures of the same ramp this summer.


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.

The Cornelius Pass Road closure no longer overlaps with the 11-day closure of the ramp from U.S. 30 east to I-405 south. During nighttime closures of the ramp from U.S. 30 east to I-405 south, trucks that typically use Cornelius Pass Road should follow posted detour signs to I-405.

Visit for more information.

Visit​ for traffic conditions updated 24/7. Visit the weekly construction update​ for Portland metro area construction information one week in advance.


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​​.​​​​​​​​​​

Read the weekly construction update, detailed traffic impacts information updated every Friday.

Visit​​ for up-to-date traffic impacts.​​​​​​​​​​​

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

8/16/2019 10:59 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
June 14_I-405-North-off-ramp-to-Kerby_Closure-and-Detour-Factsheet-19533.pdfJune 14 Ramp Closures and Detours Fact Sheet
June-21_I-405-North-off-ramp-to-Kerby_Closure-and-Detour-Factsheet_19533.pdfJune 21 Ramp Closures and Detours Fact Sheet
June-28_I-405-North-off-ramp-to-Kerby_Closure-and-Detour-Factsheet_19533.pdfJune 28 Ramp Closures and Detours Fact Sheet

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