What does a flashing yellow traffic light indicate?

A flashing yellow traffic light indicates that drivers should proceed with caution. This signal alerts drivers to be aware of potential hazards and to slow down as they approach the intersection or area where the light is blinking. It serves as a warning to be vigilant and to watch for other vehicles, pedestrians, or any other obstacles that may require immediate attention. Unlike a solid yellow light, which generally signals that the light will soon turn red, a flashing yellow is a prompt to exercise careful driving without the need to stop completely.

The other options provided do not accurately represent the intent of a flashing yellow light. Stopping completely is unwarranted when encountering this signal, and turning on headlights is not specified as a requirement unless visibility is low. Speeding up to clear the intersection can pose safety risks, as it does not align with the cautionary nature of the flashing yellow indication.