Trooper Mark Francis said it was the third time in a week that a trooper has been struck on Washington state roadways.
A preliminary investigation found that the 47-year-old trooper was parked on the shoulder along the northbound lanes of I-5 when his patrol car was hit by a 2011 Chevy pickup being driven by a 56-year-old Lakewood man.
The trooper was taken to St. Joseph's Hospital in Bellingham for treatment of minor injuries and released. His patrol car, a 2012 Chevy Caprice, was totaled.
The driver of the pickup was not injured. Charges are pending against him.
Drugs and alcohol were not a factor in the crash, the State Patrol reported.