What does one or more yellow lights flashing at traffic signals mean?

When one or more yellow lights are flashing at traffic signals, it indicates that the traffic signals may be malfunctioning or that there is a need for caution in that area. This flashing yellow light serves as a warning to drivers to pay close attention to the traffic situation ahead. It implies that the usual traffic control rules may not be in effect, and drivers should be prepared to take appropriate actions, such as proceeding with caution or yielding to any pedestrians or vehicles in the intersection.

In this context, drivers should not interpret the flashing yellow as a directive to come to a complete stop, as they would with a red signal. Instead, it suggests that the situation requires increased vigilance. The other options presented do not accurately reflect the meaning of flashing yellow lights, as they relate to different traffic situations.