What does a yellow traffic light indicate?

A yellow traffic light indicates that drivers should prepare to stop as the light is about to change to red. This signal serves as a warning to alert motorists that they need to make decisions regarding their speed and position. A yellow light allows some time for vehicles that are already in the intersection to clear it safely, while also indicating to those approaching the intersection to slow down and prepare to stop.

In contrast, the other options suggest actions that can lead to unsafe driving. For instance, going faster to clear the intersection could result in running a red light, which is a traffic violation and poses dangers to both the driver and others on the road. Similarly, proceeding with caution implies maintaining the current speed without preparing to stop, which might not be safe if the light is about to turn red. Finally, stopping immediately isn't always advisable, as drivers who might be too close to the intersection when the light turns yellow may not have enough time to stop safely, potentially causing accidents.