Prohibitive Signs: What does a red circle with a diagonal bar indicate?

Prohibitive Signs: What does a red circle with a diagonal bar indicate?

• A. Prohibition of specific actions.
• B. Merging allowed.
• C. Warning of a hazard.
• D. Mandatory direction to follow.

Answer: (A)

Prohibitive signs show actions you must not take. A red circle signals prohibition, and the diagonal bar across the circle means that the depicted action is not allowed. In Alberta, these signs are used to label specific activities you can’t do—no parking, no U-turn, no left turn, etc.—and you must comply by not performing that action. This is different from warning signs, which are yellow triangles signaling hazards, and from mandatory signs, which are blue circles directing you to do something.

Prohibitive signs show actions you must not take. A red circle signals prohibition, and the diagonal bar across the circle means that the depicted action is not allowed. In Alberta, these signs are used to label specific activities you can’t do—no parking, no U-turn, no left turn, etc.—and you must comply by not performing that action. This is different from warning signs, which are yellow triangles signaling hazards, and from mandatory signs, which are blue circles directing you to do something.