Additional work required in 2021
Since spring 2019, crews successfully repaired and replaced a number of freeway joints on the elevated
sections of I-405 on either side of the Fremont Bridge and from I-405
north to U.S. 26 west, and installed new concrete surfaces on three
When crews began repairing two bridge
joints on the ramp from U.S. 30 to I-405 north and south in fall 2020,
they discovered the joints needed full replacements based on their
condition, not just repairs. This will extend the lifespan and safety of
the structure, but will require some traffic impacts in spring or
summer 2021. More information about the specific timing of these
replacements will be shared in advance of the work.
Until we are ready to replace the
additional bridge joints, no traffic impacts are anticipated. Thank you
for your patience throughout this project. We will send emails and
update the project website as more information is available. In the
meantime, check TripCheck.com for real-time traffic impacts.
Nearby Traffic Impacts
- The Portland Bureau of Transportation is constructing a new active pedestrian and bicycle bridge over I‐405 at NW Flanders Street. A weekend closure of I-405 is expected Jan. 22-25, 2021. For more information on impacts and schedule,
visit their project website.
Visit the weekly construction update for Portland metro area construction information one week in advance.
General Traffic Impact Information
This work will impact traffic on multiple freeways including I-405, U.S. 30, I-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.
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.
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.
Construction ImpactsConstruction 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.
We 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