What does a white rectangle with black letters indicate?

A white rectangle with black letters indicates regulatory signs. These signs are critical for enforcing laws and regulations on the roadway and communicate important information that drivers must follow, such as speed limits, parking regulations, and other rules that govern safe driving behavior. The use of white backgrounds with black text is designed to ensure high visibility and easy readability so that drivers can quickly understand the necessary actions they need to take.

Regulatory signs are essential for maintaining order and safety on the roads, helping to prevent accidents and ensure smooth traffic flow. The positioning and clarity of these signs are key to their effectiveness in conveying important messages to drivers. Other types of signs, such as warning signs, typically use yellow and black colors; construction area signs often feature orange; and information signs can come in a variety of colors and shapes but are not standardized like regulatory signs.