Final answer:
At a steady yellow arrow light, the driver should prepare to stop if safe since the turning period is ending. It is not recommended to speed up or do other maneuvers like U-turns unless indicated by traffic signs.
Step-by-step explanation:
At a steady yellow arrow light, the correct action to take is to prepare to stop if safe. This is because a yellow arrow indicates that the protected turning period is about to end, and you must be prepared for the signal to turn red, which would require a full stop. If you are too close to the intersection to stop safely when the yellow arrow appears, you should proceed with caution. However, in no circumstance should a driver speed up to clear the intersection or make a U-turn unless specifically permitted by a different traffic control device. Clear understanding of traffic signals is crucial for road safety and adherence to traffic laws.