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Traffic signs that prohibit certain actions or movements are red in color and increase safety by controlling the flow of traffic through intersections.
Stop – Octagon
This sign means you must come to a complete stop. Yield to other vehicles and stop and stay stopped for pedestrians crossing in marked or unmarked crosswalks. When it is safe, you may enter the intersection.

Yield – Triangle
This sign means you should reduce speed and yield right of way. If needed, stop the same as you would for a stop sign.

Do Not Enter – Square
This sign warns you not to enter a road or freeway. You will see this sign if you are going the wrong way.

No Left Turn; No Right Turn; No U Turn
These signs prohibit certain actions. When you see a sign with a red circle and a slash mark, it means do not make the turn shown.
