What does a flashing yellow signal at a pedestrian crosswalk indicate to approaching drivers?

• Proceed with caution and be prepared to stop for pedestrians.
  Explanation:

  "It indicates to approaching drivers that they should proceed with caution as pedestrians may be crossing or preparing to cross the road."
• Accelerate to clear the crosswalk before pedestrians enter.
• Come to a complete stop until the signal turns solid green.
• Ignore the signal and continue driving at the same speed.