A driver was sent to Harborview Medical Center on Saturday night after colliding with a barrier on Interstate 405 in Renton.
Bruce Cote of Covington, 50, was taken to the hospital after his vehicle left the roadway headed southbound just north of State Route 167, the Washington State Patrol reports.
WSP reports the Cote - who was driving a Ford pickup truck - wasn't wearing a seatbelt, and authorities suspect alcohol or drugs could have been involved. Charges are pending.
No one else was injured as a result of the collision.