What do regulatory signs typically look like?

Regulatory signs are designed to inform drivers of laws and regulations that must be followed, and they typically have a standard visual representation to ensure clarity and recognition. The correct choice describes regulatory signs as having a square shape with black lettering on a white background. This color scheme and shape provide high visibility and clear communication of essential rules such as speed limits, stop signs, and yield signs.

The format helps drivers quickly understand the law they are expected to adhere to, supporting road safety and orderly traffic flow. Familiarity with these signs is crucial for all drivers, as they are fundamental to navigating roadways safely and in accordance with regulations.