What are regulatory signs typically characterized by?

Regulatory signs are primarily characterized by their rectangular shape and white background. These signs provide important information about rules and regulations that must be followed by drivers, such as speed limits, parking regulations, and other legal requirements. The rectangular design is standard for this type of signage as it allows for clear communication of information in a straightforward manner. The use of a white background helps to ensure visibility and legibility, making it easy for drivers to quickly recognize and understand the required actions or behaviors while on the road.

In contrast, other shapes and colors are designated for different types of signs; for instance, a round shape with a yellow background signifies warning signs, while an octagonal shape with a red background is specifically reserved for stop signs. Diamond-shaped signs with black letters are often used for caution and warning purposes, but they do not serve as regulatory signs. Understanding the specific characteristics of each sign type helps drivers navigate roads safely and adhere to traffic laws effectively.