The collision occurred around 4:15 p.m. about one mile east of Index when a westbound car crossed the centerline and struck a Ford F-250 pickup truck, Washington State Patrol trooper Mark Francis said.
The accident tied up traffic for hours. The road was reopened at about 8:30 p.m.
The driver of the car, a four-door Mercedes, died at the scene. The car reportedly was being driven erratically before the collision, Francis said.
His passenger, a pregnant woman, was taken to a hospital with serious injuries, he said.
Three men in the pickup truck also were taken to hospitals.
Names, ages and hometowns of the people involved in the crash were not immediately available.
More Local News Headlines
County Council: veteran Sullivan vs. newcomer Tisdel 3:28 p.m. Teacher seeks support for siblings shot over supposed gang colors Missing teen found in Everett, but not her baby daughter 4:41 p.m. Marysville, Brier advisory measures ask voters to consider fireworks ban 228th St. in Bothell reopens after overnight closure from fire 3:50 p.m. Man dies of injuries 3 months after collapse at Big Four Ice Caves Security exercise at Naval Station Thursday 3:39 p.m. Dozens of candidates in race to sit on county charter commission
Our new comment system is not supported in IE 7. Please upgrade your browser here.