Multi-Truck Collision Causes Major Delays on I-5 Southbound
A collision involving two semi-trucks blocked multiple lanes on southbound I-5 in the Seattle-Tacoma area on Wednesday morning, leading to extensive traffic backups.

Seattle Tacoma, WA, September 16, 2026 — A significant traffic incident involving two semi-trucks disrupted travel on Interstate 5 southbound in the Seattle-Tacoma area early Wednesday morning. The collision resulted in the blockage of multiple lanes of traffic, prompting substantial delays and extensive backups for commuters.
The exact time of the collision was not immediately available. However, authorities confirmed the incident occurred on Wednesday morning, impacting the busy I-5 corridor. The involvement of two semi-trucks led to a considerable obstruction, forcing the closure of several lanes on the southbound route.
Emergency responders and transportation officials were on the scene to manage the situation, clear the wreckage, and restore traffic flow. The duration of the lane closures and the full extent of the traffic disruption were not immediately detailed, but the nature of the incident involving large commercial vehicles typically results in prolonged delays.
The Seattle-Tacoma area is a critical transportation artery, and closures on I-5 frequently lead to cascading effects on surrounding roadways. Commuters traveling through the affected stretch were advised to seek alternate routes or expect significant delays throughout the morning hours. Information regarding the cause of the collision, any injuries sustained, or the specific agencies involved was not provided in the initial reports.
Story summarized from the original created by Jim.Jensen@fox.com (Jim Jensen) on www.fox13seattle.com, see more information here.