In North America, it's a rectangle.
octagon
A downward pointing triangle.
A pedestrian sign is typically rectangular or square in shape. It is designed to be easily visible to motorists and pedestrians to indicate areas where pedestrians have the right of way.
that one sign, with that one shape to it... you know that tells you to do those one things
For the most part, the shape of the sign is for only one thing. And that one thing is so you can recognize what type of sign it is at a further distance away (a diamond warning sign, you will know to slow down before you read what the warning is.)
A stop sign is in the shape of an octagon.
A stop sign is octagonal in shape.
A stop sign, a One Way sign, and a Yield sign.
In no way shape or form is a neon sign even close by .001 percent to a digital computer.
The shape of a yield sign is a downward-pointing triangle. This triangular shape is typically white with a red border and the word "YIELD" in the center. The design is intended to alert drivers to give way to oncoming traffic or pedestrians.
Hand held out with another one over it..?
There is usually a sign that says "ONE WAY"...