What does a red light signify at an intersection?

A red light at an intersection signifies the requirement to stop completely and not enter the intersection. This traffic signal is crucial for maintaining safe traffic flow and preventing accidents. When a driver encounters a red light, it indicates that vehicles must come to a full stop at the designated stop line or before entering the intersection if no line is present.

Ignoring this signal can lead to serious traffic violations and potential collisions, as it is designed to control the right-of-way. Other vehicles may have the right of way, and failing to stop could result in dangerous situations. Understanding this rule helps ensure the safety of all road users, including pedestrians, cyclists, and other drivers.