Seattle, WA (August 12, 2025) – A two-vehicle collision with injuries occurred late Sunday morning on northbound Interstate 5 near Mercer Street, causing lane blockages and traffic delays through Seattle’s South Lake Union area.
According to Washington State Patrol dispatch records, the crash was reported around 10:26 a.m. and involved a black passenger vehicle and a white pickup truck. The collision took place in the left and center lanes, prompting an immediate emergency response to assist the injured parties.
Paramedics treated at least one person at the scene, though the exact number of injured individuals and their medical conditions have not yet been disclosed. Tow services were required to remove the damaged vehicles, and traffic was backed up for several miles during the cleanup and investigation.
The Mercer Street interchange is one of Seattle’s busiest freeway access points, where heavy merging and lane changes often create challenging driving conditions. Authorities are working to determine the cause of the crash, including whether speed, following distance, or unsafe lane changes played a role.
We send our best wishes to those injured and hope for their swift recovery.
Interstate 5 Crashes in Seattle
Accidents along I-5 near downtown Seattle are common due to the high volume of vehicles, complex interchanges, and heavy commuter traffic. The section near Mercer Street is especially prone to collisions as drivers navigate lane reductions and ramp merges, often at varying speeds.
Two-vehicle crashes at freeway speeds can result in a wide range of injuries, from whiplash and contusions to more severe trauma requiring hospitalization. Beyond the immediate medical concerns, victims often face challenges with vehicle repairs, lost income, and ongoing rehabilitation.
Washington State has implemented several safety initiatives aimed at reducing crashes on urban freeway segments, including increased patrol presence, real-time traffic updates, and ramp metering systems. However, driver attentiveness and patience remain essential in preventing accidents in congested corridors.
If you’ve been hurt in an interstate crash, securing the right support early on can make a major difference in your recovery.
Local Accident Reports is committed to helping crash victims connect with essential resources—from obtaining official collision reports to finding reliable medical care and legal guidance. Contact us today to get the assistance you need to move forward after a serious crash
