Regulatory Signs 17/ 23
California

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You must not make a left turn at this intersection.

Signs often use symbols or pictures rather than words. Each type of sign has a special color and shape to help you easily recognize the sign at a glance. 

Regulatory Signs—Prohibitive.
Traffi c signs that prohibit certain actions or movements are red in color and increase safety by controlling the fl ow of traffic through intersections.

All regulatory devices on the road tell you to stop, proceed in a certain direction, or limit your speed.