Tumwater, WA (March 20, 2026) – A chain-reaction crash involving multiple vehicles left two people injured in Tumwater.
The accident was reported around 1:15 p.m. on Thursday, March 19, along northbound Interstate 5 at Trosper Road. According to reports, a utility van driven by a man from Puyallup struck a vehicle ahead of him while traveling in the far-left lane.
The initial impact triggered a series of collisions involving several vehicles. The second car hit a third, which then struck a fourth and a fifth vehicle in the chain.
Two people inside the third vehicle, both from Chehalis, were hurt and taken to Providence St. Peter Hospital in Olympia. No additional details about their conditions have been released.
Traffic in the area was blocked for nearly two hours as crews worked to clear the scene. Authorities continue to investigate the cause of the crash.
We are thinking of those injured as they receive medical care.
What Happens in Chain-Reaction Crashes on Busy Interstates?
Chain-reaction crashes often occur when one vehicle hits another, causing a ripple effect through nearby traffic. These incidents are more common on busy highways where cars travel close together at higher speeds.
When a driver does not have enough space to stop, even a single impact can involve multiple vehicles. Each additional collision can increase the chance of injuries and damage.
Traffic flow plays a major part in how these crashes develop. Sudden braking, lane changes, or limited visibility can reduce reaction time for drivers behind the initial crash.
Maintaining a safe following distance can help reduce the risk. Giving enough space between vehicles allows more time to react and may prevent a single crash from involving several others.
