What does a green circle passing permitted sign mean?
Passing is permitted here
A green circle means you may do the activity shown: here, passing is permitted. It is the opposite of a red circle with a slash, which forbids the action shown.
Why the other answers are wrong
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Passing is prohibited here
That is the opposite. The sign banning passing uses a red circle with a line through it. A green ring means you may do the activity shown, so this one opens passing up.
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Two-way traffic begins
Warnings about oncoming traffic are yellow diamonds, not white squares with a coloured ring. Here both cars face the same way, side by side, which pictures one vehicle passing the other.
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A passing lane is closed ahead
Lane closures are posted on orange temporary condition signs used around road work. A green ring never closes anything, it tells you the activity pictured inside is allowed on this road.
Quick way to remember
Green circle = allowed; red circle with a slash = not allowed.
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
