What actions must be taken when a traffic signal turns red?

When a traffic signal turns red, the appropriate response is to stop immediately unless you are in an intersection. This rule is fundamental to maintaining safety on the road, as a red light indicates that vehicles must come to a complete stop to allow cross traffic and pedestrians to safely clear the intersection. Stopping at a red light helps prevent collisions and allows for an orderly flow of traffic when the signal changes.

The distinction about being in an intersection is important; if you are already in the intersection when the light turns red, you should clear it safely rather than stop suddenly, which could cause an accident. Therefore, the emphasis on stopping immediately reinforces the idea that drivers must obey traffic signals to ensure road safety and compliance with traffic laws. This action not only protects the driver but also other road users, including pedestrians and cyclists.