What does a yellow traffic signal mean?

A yellow traffic signal serves as a warning that the light is about to turn red, prompting drivers to prepare to stop. This signal indicates that vehicles currently in the intersection or approaching it should be ready to halt unless they are too close to the intersection to stop safely. The yellow light is crucial in traffic safety, as it helps to reduce potential collisions by signaling the change in traffic flow. It emphasizes the need for caution and attentiveness, thereby ensuring that drivers are prepared for the upcoming red light.

The other options do not accurately reflect the meaning of a yellow traffic signal: proceeding with caution can be misleading as it doesn’t account for the need to stop when the light changes; speeding up to clear the intersection could lead to dangerous situations; signaling to pedestrians to cross is not the intent of a yellow light, which is primarily for vehicular traffic. Understanding the function of a yellow traffic signal is essential for maintaining safety on the road.