What Caused the 7-Vehicle Crash on the I-5 Bridge in Vancouver, WA?

Michael GrossmanJuly 21, 2025 2 minutes

A seven-vehicle collision on the Interstate Bridge connecting Vancouver and Portland was allegedly triggered by a semi-truck traveling at unsafe speeds during heavy traffic Friday morning. According to the Washington State Patrol, the crash occurred around 9:50 a.m. when a 53-year-old Federal Way man, operating a semi-truck southbound on I-5, reportedly failed to slow down for traffic and struck two vehicles, initiating a chain-reaction crash. One person, a 52-year-old woman from Vancouver, was hospitalized, while the other drivers involved were not seriously hurt.

When a semi-truck collides with multiple vehicles in stop-and-go traffic, the consequences can be severe, and it raises important questions about whether the truck was being operated responsibly given the conditions.

Could Speed, Distraction, or Fatigue Be Factors?

Authorities have already alleged that the truck was moving too fast for the conditions. However, investigators will likely need to examine whether the driver was distracted, following too closely, or failed to anticipate slowing traffic. Fatigue may also have played a role if the driver didn’t react in time to avoid the crash.

Should the Semi’s Braking or Mechanical Systems Be Evaluated?

Even if speed is found to be a contributing factor, it’s also important to determine whether the truck’s braking system was fully functional. Commercial trucks require more stopping distance than passenger vehicles, especially on bridges or downhill grades. If there was a mechanical issue, such as worn brakes or a faulty anti-lock braking system, that could also help explain why the truck couldn’t stop in time.

What Evidence Should Be Examined?

To fully understand the cause, investigators should analyze Engine Control Module (ECM) data to confirm speed, braking activity, and throttle input in the moments before the crash. Dashcam or traffic camera footage from the bridge could provide additional context, as would statements from other drivers. Truck inspection records and the driver’s logbook could reveal whether the vehicle was roadworthy and whether the driver had been on duty too long.

Why Investigating Every Factor Matters

When a semi-truck allegedly sets off a multi-vehicle crash in a high-traffic area, it’s vital to determine exactly how and why it happened. This includes assessing both driver behavior and vehicle condition. A thorough investigation can help ensure accountability is assigned where necessary and that those affected receive clear answers on what happened and why.