State v. Brown, No. 96884-5 (December 26, 2019), Washington Supreme Court.
Brief: Because the defendant did not signal continuously while his vehicle turned left through an intersection, he violated RCW 46.61.305. The phrase “when required” in RCW 46.61.305(2) compels drivers to use their signal every time they turn or change lanes on a roadway and relates to the manner in which the required signal is made—continuously during not less than the last 100 feet traveled.
Translation: Police can pull you over if you fail to continuously activate your turn signal when turning at an intersection.