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Seattle traffic: Southbound I-5 blocked after crash between two semi-trucks

By
FOX 13 Seattle
Traffic
Published September 16, 2026 6:49 AM PDT
Published September 16, 2026 6:49 AM PDT

The Brief

    • A two-semi-truck crash blocked multiple southbound lanes of I-5 on the Ship Canal Bridge early Wednesday, causing 5-mile backups.
    • WSDOT warns of an extended closure with no estimated reopening time as emergency crews respond to the scene.
    • Drivers are urged to seek alternative routes while further details on the collision and driver conditions remain unavailable.

SEATTLE - Traffic is backed up about 5 miles on southbound I-5 after a crash involving two semi-trucks blocked multiple lanes on Wednesday morning. 

A two-semi-truck crash blocked multiple southbound lanes of I-5 on the Ship Canal Bridge early Wednesday, causing 5-mile backups. WSDOT warns of an extended closure with no estimated reopening time as emergency crews respond to the scene. Drivers are urged to seek alternative routes while further details on the collision and driver conditions remain unavailable.

Seattle I-5 traffic: Crash on Ship Canal Bridge blocks lanes

What we know:

The Washington State Department of Transportation (WSDOT) sent out the initial traffic alert at 5:28 a.m., saying there was a collision just south of Northeast 45th Street on the Ship Canal Bridge blocking the three left lanes. 

Emergency responders are on the scene, which is expected to be an extended closure with no estimated time of reopening.

At around 6:13 a.m., WSDOT confirmed that two semi-trucks were involved. In addition to the crash delays, separate repair work has the left lane closed further south. Crews say access to eastbound SR-520 is not impacted by the crash.

What they're saying:

"The collision on SB I-5 on the Ship Canal Bridge is a semi / two car collision with no major injuries," said Washington State Patrol Trooper Rick Johnson on X. "Multiple lanes blocked and tow trucks will be arriving shortly. Getting this cleared as quickly as possible."

What we don't know:

Further details about what led up to the crash have not yet been released.

Drivers on their morning commute are asked to plan ahead and seek alternative routes.

This is a developing story. Check back for updates.

The Source: Information in this story comes from multiple social media alerts by the Washington State Department of Transportation.

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