What does a yellow traffic signal indicate for a vehicle that is able to stop safely?

A yellow traffic signal serves as a warning that the light will soon turn red. When a vehicle is able to stop safely upon seeing the yellow light, the appropriate response is to slow down and prepare to stop. The purpose of the yellow light is to caution drivers about impending changes in traffic signals, allowing them enough time to decelerate and halt if it is safe to do so.

This action is vital for maintaining safety and preventing accidents at intersections, as running a red light can lead to severe collisions. The yellow light provides a transitional phase to alert drivers that they need to react appropriately to the change in traffic control. It's important for drivers to remain vigilant while approaching intersections, as the yellow light indicates that they should not continue through the intersection at the same speed, but rather, take the necessary steps to stop if they can do so without risk.