Section 46.37.674 - Signal preemption device-Accident-Substantial bodily harm-Penalty(1) When an accident that results in injury to a person that arises to substantial bodily harm as defined in RCW 9A.04.110 occurs as a proximate result of the operation of a signal preemption device which was not authorized in RCW 46.37.670, the driver is guilty of negligently causing substantial bodily harm by use of a signal preemption device.(2) Negligently causing substantial bodily harm by use of a signal preemption device is a class B felony punishable under chapter 9A.20 RCW.