WAC 468-95-270
WAC 468-95-270. Meaning of lane-use control indications
Pursuant to RCW 46.61.072 , amend the Standard of MUTCD Section 4T.02, paragraph B, to read:
A steady yellow x or a flashing red x means that a driver should prepare to vacate, in a safe manner, the lane over which the signal is located because a lane control change is being made, and to avoid occupying that lane when a steady RED X is displayed.