Road rules / 🇸🇬 signs

The only eight-sided (octagonal) traffic sign is the:

✓ ANSWER

Stop sign

The stop sign is uniquely octagonal so it can be recognised even from behind or when obscured.

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Related questions

Circular traffic signs generally:A sign with a red circular border generally means:A blue circular sign generally means:Triangular traffic signs generally:Rectangular traffic signs generally:At a red octagonal sign with the word STOP you must: