What does the no turns sign mean?
No turns are allowed. Continue straight through
This sign shows both turn arrows inside a red circle with a slash, meaning no turns are allowed in either direction. You must continue straight through.
Why the other answers are wrong
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Turns are allowed in both directions
This reads the sign backwards. A green ring means the action shown is allowed, while a red circle with a line through it means it is banned. Both arrows sit under the slash here.
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Two-way traffic ahead
Warnings about traffic in both directions come on yellow diamond signs, such as divided highway ends. This is a white square with a red slash, so it gives an order, and the arrows mean turns.
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A divided road begins ahead
Divided highway begins is a yellow diamond warning sign that tells you to keep to the right-hand road. Nothing is crossed out on it, and it never carries a red circle and slash.
Quick way to remember
Both turn arrows are crossed out.
Based on the official Ontario MTO Driver's Handbook.
Reading it once is not enough
Drill this question in a scored round and find out what else you are shaky on.
Practise Road Signs: Regulatory