What is indicated by a yellow light at an intersection?

A yellow light at an intersection serves as a caution signal that informs drivers that the traffic light is about to change to red. When a driver sees a yellow light, it is a clear indication to prepare to stop unless they are too close to the intersection to do so safely. This light is designed to prevent accidents by alerting drivers to the need to slow down and stop as needed, thus ensuring that they can react appropriately to the change in traffic signals.

By reminding drivers to be cautious and start decelerating, yellow lights help to maintain safety within the intersection and reduce the likelihood of collisions that might occur if drivers were to disregard the caution signal. It's essential for drivers to be attentive and respond to a yellow light by preparing to stop rather than trying to rush through the intersection or accelerate.