A steady yellow arrow pointing left at an intersection indicates what?

A steady yellow arrow pointing left at an intersection serves as a warning to drivers that the left turn signal is about to change to red. This signal notifies drivers who are planning to make a left turn that they should prepare to stop, as the opportunity to proceed with their turn will be ending shortly. It is important for drivers to understand this indication to prevent unnecessary accidents and ensure safety at the intersection.

In this scenario, drivers need to pay attention and be ready to halt their vehicle if it is safe to do so, rather than proceeding with the turn, as it will soon be prohibited. This action promotes a smooth traffic flow and maintains order at intersections where left turns frequently occur.

The other choices do not accurately describe the meaning of the yellow arrow. For instance, preparing to stop for pedestrians pertains more closely to pedestrian signals or other warning indicators, while a green light following soon does not accurately reflect the implication of a yellow signal. Lastly, turning left being prohibited would require additional signage or signals, not just a steady yellow arrow.