How is a regulatory sign typically characterized?

A regulatory sign is typically characterized by its rectangular shape and black and white color scheme. These signs convey laws and regulations that drivers must follow to ensure safety and compliance on the road. The rectangular format is easily recognizable and helps differentiate regulatory signs from other types, such as warning or informational signs. The black and white colors provide a clear and stark contrast that enhances visibility, allowing drivers to quickly understand the directives being presented.

In contrast, other shapes and colors are typically assigned to different types of signs. For example, triangular signs usually indicate a warning or caution, while round signs may be used for railway crossings. Spherical signs, which are not standard for roadway use, might confuse drivers rather than inform them. Therefore, the rectangular shape and black and white color scheme of regulatory signs are crucial for maintaining clarity and ensuring that drivers can quickly respond to the information provided.