A driver hit an Idaho State Police trooper vehicle Wednesday while it was protecting firefighting operations along Interstate 15 near Arimo. The trooper was helping another driver whose vehicle had caught fire. The driver of that car was sitting in the passenger seat of the patrol car and the trooper was in the driver's seat. The patrol car was hit from behind by a Honda sedan. ISP says traffic cones were out along the roadway, the patrol car had emergency lights activated and a florescent pink sign was attached to the rear of the patrol car that read "slow down." The patrol car was slowly moving forward in the closed right lane to protect firefighting operations when it was hit. The trooper and both drivers were taken to Portneuf Medical Center in Pocatello.