What does the right lane ends ahead sign mean?
The right lane ends ahead. Merge safely into the lane on your left
This sign warns that the right lane ends ahead. If you are in the right-hand lane, merge safely with traffic in the lane to your left before the lane runs out.
Why the other answers are wrong
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A new lane is opening on the right
This sign shows the right-hand line bending in and stopping, which means a lane is being taken away, not added. Read which line ends, then merge left before it runs out.
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Keep right to let faster traffic pass
Keeping right for faster traffic is a regulatory rule posted on a white rectangular sign with wording. This is a yellow diamond warning, and staying right here would leave you with no lane.
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The road becomes one-way ahead
One way is a regulatory sign with a single arrow. Here the road still carries two lanes going the same direction, and only the right-hand one runs out ahead.
Quick way to remember
One of the two lines on the sign comes to an end.
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: Warnings