Which road signs generally use a white background with black letters or symbols?

The correct response identifies regulatory signs, which are designed to inform drivers of laws and regulations that must be followed while using the road. These signs often feature a white background with black letters or symbols to ensure high visibility and clarity, helping to communicate important information about traffic rules. Examples of regulatory signs include speed limit signs, no entry signs, and stop signs.

In contrast, warning signs usually utilize a yellow or orange background to alert drivers to potential hazards or changes in the road conditions. Information signs tend to use blue or green backgrounds and provide helpful directions or information about services. Construction signs typically have a bright orange background to draw attention to areas where road work is taking place, enhancing the visual alertness needed in such situations.