Final answer:
A steady yellow arrow signal pointing left at an intersection indicates that the signal is about to change and that drivers should prepare to stop. It does not permit one to turn left against oncoming traffic, nor does it advise to increase speed.
Step-by-step explanation:
At an intersection, a steady yellow arrow signal pointing left indicates the signal is about to change to a green or red light or a red arrow. This signal is a warning to drivers that the protected phase of turning left is ending, and they should prepare to stop. It does not mean that oncoming traffic is stopped or that one should increase speed. In the context of traffic signals, the presence of a steady yellow light is to ensure the safety of both drivers and pedestrians by providing a clear transition between the changes in right-of-way.
Vehicle speed is often regulated by such traffic signals, as drivers anticipate the change in lights and must adjust their speed accordingly. Moreover, pedestrian safety is significantly enhanced when traffic signals are correctly observed and followed, allowing people to cross intersections at designated times without having to dodge vehicles.
It's critical to understand such traffic rules for the well-being of all road users and to minimize road accidents, some of which have had tragic outcomes such as loss of life. Therefore, adherence to traffic signals and understanding their indications are paramount.