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MULTI-VEHICLE SEMI CRASH – DIESEL SPILL – INVESTIGATION ACTIVE

Multi-Vehicle Crash and Diesel Spill Block NB I-5 in Seattle

Beverly Law
Published by Beverly Law
October 21, 2026 · 4 min read
Northbound I-5 north of S Michigan St, Seattle, WA
Open Street View ↗
Northbound I-5 near the South Michigan Street exit by Boeing Field, Seattle. Source: Google Maps.
KEY DETAILS
DATE & TIME
Tuesday, October 20, 2026, around 2:55 p.m.
LOCATION
Northbound I-5 north of S Michigan St, Seattle, WA
VICTIM
Multiple people hurt and treated at the scene; one person reportedly had a broken arm
ROAD CLOSURES
Multiple lanes blocked for several hours; all lanes reopened around 8:15 p.m.
INVESTIGATION
Cause under investigation by Washington State Patrol

A crash involving three cars and a semi-truck blocked multiple lanes of northbound I-5 in Seattle on the afternoon of Tuesday, October 20, 2026. The collision happened around 2:55 p.m. just north of the South Michigan Street exit, near Boeing Field. The semi’s driver-side fuel tank was reportedly damaged, and diesel leaked onto the roadway. Multiple people were hurt, according to the Seattle Fire Department.

FOX 13 Seattle reported that multiple lanes stayed blocked for several hours while crews cleaned up the fuel, and that all lanes reopened around 8:15 p.m. KIRO 7 reported that a Washington State Patrol trooper said one person had a broken arm, and that WSDOT listed the HOV lane and the two right lanes as closed. The cause of the crash is under investigation, and no fault has been officially determined. People hurt in multi-vehicle and commercial truck crashes can face medical bills and lost income, and Beverly Law helps injured people understand their options with no fee unless we win.

X
FOX 13 Seattle
@FOX13Seattle · Oct 20, 2026

Lanes blocked on NB I-5 in Seattle after multi-vehicle crash, diesel spill

FOX 13 Seattle
Photo: FOX 13 Seattle
Oct 20, 2026 · View on X

Where It Happened

Northbound Interstate 5 just north of the South Michigan Street exit, near Boeing Field, Seattle, WA

Interactive map — crash location
SOURCESFOX 13 Seattle·KIRO 7

What the Law Says

Washington’s rules of the road require drivers not to follow another vehicle more closely than is reasonable and prudent, with due regard for speed, traffic and the condition of the highway (RCW 46.61.145). In multi-vehicle crashes, investigators often look at following distance, speed and braking when determining what happened.

Washington follows a pure comparative fault system, so responsibility can be divided among several drivers and an injured person’s recovery is reduced by their own percentage of fault, if any (RCW 4.22.005). That makes it important to preserve evidence early in a crash involving several vehicles.

This summary is general information, not legal advice. Every case depends on its specific facts.

How Beverly Law Can Help

If you lost a loved one in this accident, our attorneys can help you understand your options. Free consultation, English & Spanish, and no fee unless we win.

Editorial note: Beverly Law publishes accident reports as a public service, based on information from official traffic authorities, local news outlets, and public records. If you are a family member of the victim and would like information added, corrected, or removed, please contact our editorial team: intakeassistant5@beverlylaw.org

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