Final answer:
The subject of this question is Driving and Road Safety. Traffic signals are important for controlling the flow of traffic and ensuring safety.
Step-by-step explanation:
The subject of this question is Driving and Road Safety. It is important to follow traffic rules and regulations to ensure the safety of both drivers and pedestrians. Traffic signals are designed to control the flow of traffic at intersections and help prevent accidents. By obeying the instructions of traffic signals, drivers can reduce their speed and avoid speeding through intersections.