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A yellow diamond carrying two opposed arrows.
Also known as: Two-way traffic Japan
Warns that two-way traffic resumes ahead, posted where a one-way or divided section ends.
Warns that traffic runs in both directions on the road ahead.
Contexts: Road signage
Matters most at the end of an expressway contraflow or a divided section, where a driver has spent some distance with no oncoming traffic and the sign is the only notice that the assumption has stopped holding.
Contexts: Road signage
A square stood on one corner containing two vertical arrows side by side, one pointing up and one pointing down.