What signifies to a driver that they should proceed with caution?

A flashing yellow light signifies to a driver that they should proceed with caution. This light indicates that while it is safe to continue driving, the driver must be aware of their surroundings and prepare to stop if necessary. The flashing yellow serves as a warning that conditions may require extra attention, such as approaching an intersection where visibility may be limited or where other vehicles or pedestrians may be present.

In contrast, a solid red light and a stop sign indicate that the driver must come to a complete stop and cannot proceed until it’s safe to do so. A solid green light means the driver can proceed without hesitation, assuming the intersection is clear. Therefore, the flashing yellow light clearly communicates the need to proceed thoughtfully and carefully.