Which light is always positioned either on the top or the left?

In traffic signal systems, the red light is always positioned at the top or on the left side of the traffic signal. This positioning is a standard convention in the United States and many other countries, ensuring that drivers can instantly recognize the signal regardless of their own position relative to the intersection. The red light signals drivers to stop, making it critically important for safety and traffic management.

The consistent placement of the red light helps to minimize confusion for both drivers and pedestrians. Since red indicates a stop, its top or left placement serves as a clear visual cue that is easily observable. Understanding this positioning is paramount for new drivers, as it allows them to respond appropriately to traffic signals, which are essential for maintaining order on the roads.