Final answer:
Traffic signs are white rectangles with black lettering or symbols, giving information about traffic rules and requirements.
Step-by-step explanation:
The subject of this question is Driving. The signs being described are traffic signs, which provide information about rules for traffic direction, lane use, turns, speed, parking, and other special requirements. These signs are typically white rectangles with black lettering or symbols, although some may have different shapes or use red letters or symbols. It is important for drivers to understand and follow these signs to ensure safe and efficient traffic flow.