What does the swing bridge warning sign mean?
The bridge ahead lifts or swings for boats. Be ready to stop
This sign warns that the bridge ahead lifts or swings to let boats pass. Be prepared to slow down and stop when the bridge is open to marine traffic.
Why the other answers are wrong
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A low bridge limits the height of vehicles ahead
Clearance is warned by the underpass sign, which prints the room you have in metres. Here the bridge deck is raised over water, so the issue is the bridge opening, not your height.
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A narrow bridge is ahead
Ontario has its own narrow bridge warning, and it shows the road pinching in from both sides. On this sign the deck is tilted up over water, which tells you it moves.
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The bridge ahead is permanently closed
A closure would be handled by orange temporary condition signs and detour markers. A yellow diamond warns about a road you can still use, here a bridge that opens for passing boats.
Quick way to remember
The structure on the sign sits over water and can move.
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
