Why is the stop sign shaped like an octagon? ... First, the octagonal shape makes it easy for drivers traveling in the opposite direction to recognize the sign from the back, which helps prevent confusion at intersections, according to Reader's Digest.

Why are stop signs octagons UK?

The octagon STOP sign means "Stop and give way to traffic on the major road", whereas at roadworks someone is telling you to wait until they give the signal to proceed. This is presumably why they were originally different shapes because they have different meanings.

Why we use stop sign?

Q: What is the purpose of a stop sign? A: The stop sign is used to assign right of way at an intersection and to make sure that traffic flows smoothly and predictably. ... When vehicles must stop, the speed reduction is only near the stop sign, and drivers tend to speed up between stop sign controlled intersections.