What does a green traffic light indicate?

A green traffic light indicates that drivers are permitted to proceed through the intersection, provided that it is clear of vehicles and pedestrians. This means that when the light turns green, it is safe to move forward, but drivers must still exercise caution and ensure that no obstacles are present that could impede their path.

The significance of the green light is to facilitate the flow of traffic, allowing vehicles to continue moving rather than stopping. However, it is crucial for drivers to remain vigilant and make sure that they can clear the intersection safely. This includes checking for any unexpected movements of pedestrians or vehicles that may not adhere to the traffic signals.

The other options do not accurately reflect the implications of a green light. Stopping when the light is green would contradict traffic rules, while reducing speed and preparing for a lane change are actions more aligned with caution for other signals or conditions rather than the instruction provided by a green traffic light.