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Portland’s biggest traffic headache in years starts Friday

OregonLive.com • September 8, 2026 • nation

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Southbound Interstate 5 through Portland’s Rose Quarter will close completely for five weeks starting at 10 p.m. on Friday, Sept. 11, affecting a 2-mile stretch and several connecting ramps.
The closure is necessary for structural repairs including replacing bridge joints and resurfacing the highway, which has not been significantly repaired since 1985 and has deteriorated over time.
All southbound lanes and ramps, including those at Alberta Street, Greeley Avenue, and the I-405/Fremont Bridge, will be closed 24/7, while northbound I-5 lanes will remain open.
ODOT warns of severe traffic congestion with some trips potentially taking two to three times longer, especially during peak hours, and increased traffic expected on alternative routes such as I-405, U.S. 30, and various city streets.
Commuters are advised to avoid peak travel times, use public transit, bike, work from home if possible, and check real-time traffic updates and alternate routes before traveling.

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