What does a yellow traffic light indicate?

A yellow traffic light indicates that the signal is about to change to red. This warning serves as a signal for drivers to prepare to stop if it is safe to do so. The purpose of the yellow light is to alert drivers that they need to make a decision—either to stop safely before entering the intersection or to clear the intersection if they are already too close to stop comfortably. This is crucial for maintaining traffic safety and preventing accidents that can occur if a driver ignores the warning and proceeds through an intersection without caution.

The other responses imply actions that are not safe or appropriate in response to a yellow light, such as speeding up or proceeding without caution. The yellow light specifically calls for heightened awareness and allows drivers to react appropriately based on their position relative to the intersection.