Which signal color typically means “proceed with caution”?

The color that typically means “proceed with caution” is yellow. In traffic signals, yellow lights serve as a warning that the signal is about to change to red, indicating that drivers should prepare to stop if it is safe to do so. The yellow signal alerts drivers to remain attentive and be prepared for any changes ahead, promoting safety on the roads.

In contrast, red signals indicate a stop, while green means go. Blue is not used in standard traffic signals to convey any aspect of caution or stop/go instructions. The yellow light plays a crucial role in traffic management by providing a transitional phase between the go and stop signals.