What does a yellow traffic light mean?

A yellow traffic light serves as a warning that the light is about to change to red. This means that drivers should prepare to stop if it is safe to do so. The purpose of the yellow light is to alert drivers of the imminent change in traffic conditions and give them a brief period to react accordingly. It encourages caution and awareness, indicating that an intersection may soon require stopping.

The rationale behind the other options is important to clarify. While proceeding with caution is necessary when approaching a yellow light, it does not encompass the primary purpose of the light signaling the need to prepare for a stop. Ignoring the light if the intersection is clear is unsafe and could lead to accidents, as it undermines the rules of the road. Finally, speeding up to cross an intersection on a yellow light can be dangerous, as it may result in running a red light if the light changes before the vehicle clears the intersection. Understanding the significance of a yellow light helps maintain safety for all road users.