What is the purpose of a traffic light?

• A. To control the speed of traffic
• B. To indicate when to stop and go
• C. To decorate the intersection
• D. To confuse drivers

Answer: (B)

Traffic lights serve a crucial function in managing the flow of vehicles and pedestrians at intersections. Their primary purpose is to indicate when vehicles must stop and when they may proceed, thus promoting safety and reducing the likelihood of accidents. By providing clear signals—red for stopping, green for going, and yellow for caution—traffic lights help ensure that all road users understand what is expected of them at any given time.

The effectiveness of traffic lights in promoting orderly movement at intersections is essential for maintaining traffic patterns and preventing collisions. Their design is based on the need to regulate traffic, prioritize the safe crossing of pedestrians, and prevent gridlock.

The options highlighting other purposes, such as controlling speed or decorating intersections, do not align with the fundamental role of traffic lights as signals for movement. Additionally, the idea that traffic lights are meant to confuse drivers contradicts their intended function of providing clarity and guidance on road rules.