ILLINOIS (RFD) — The message apparently has not gotten through to drivers that when you see flashing lights, you have to move over and slow down. Another State Trooper was hit and killed on the shoulder of a state highway this past Thursday.

Illinois State Police Acting Director Brendan Kelly implored drivers to approach cautiously when seeing cars and emergency vehicles pulled to the shoulder.

Trooper Brooke Jones-Story was killed as she inspected a commercial truck on Route 20 in northern Illinois after being struck by a passing semi. She is the second trooper killed in a roadway accident this year and it marks the 15th time that a trooper’s vehicle has been hit.

Scott’s Law or “The Move Over Law” requires drivers to change to the other lane away any time they see flashing lights or any sort of emergency vehicle on the side of the road.