Question

Give at least one example of a regulatory sign.

Answer 1

Square with black lettering on a white background such as speed limit signs.  

Octagon, triangle, square with white lettering on a red background such as STOP, YIELD, DO NOT ENTER or WRONG WAY sign.  

Square with black and red symbols such as no U-Turn arrow sign.

that's just a list of some of  regulatory signs but there are so much more regulatory signs are just the signs that you see when driving