The color associated with caution in traffic signals is yellow. Yellow signals indicate that drivers should slow down and prepare to stop, as it typically precedes a red signal. This color is chosen for its visibility and distinctiveness, ensuring that it stands out under various weather and lighting conditions. In traffic control, yellow lights serve as a warning that conditions may change, such as the need for drivers to yield, while also being prominent enough to catch a driver’s attention. This system is essential for maintaining road safety.