What does a red traffic light mean?

A red traffic light indicates that vehicles must come to a complete stop before the intersection. It serves as a clear signal to maintain safety on the road by preventing vehicles from crossing when it is not their turn, thereby reducing the likelihood of accidents. Drivers are required to wait until the light turns green before proceeding, at which point they are given the right of way. This rule helps in managing traffic flow efficiently and ensuring the safety of all road users, including pedestrians, who may have the right of way at intersections when the light is red.

In contrast, a green light indicates that it is safe to proceed, caution is signaled by yellow lights as they warn drivers to prepare to stop, and yielding means allowing another vehicle or pedestrian the right of way, which is not communicated through a red light. Understanding the function of traffic lights is essential for safe driving practices.