W14-11.1 Drive on Left diamond-shaped Signs, also known as a WL-5 sign, are used to remind drivers who are turning at an intersection or driveway to drive on the left side of the road. It shows a two-headed arrow showing a left and right turn onto the correct side of a road with a centre line, displayed on a standard permanent warning PW diamond sign. The diamond is used in conjunction with the WL-5 "Drive on Left" supplementary (sold separately).