What does the solid yellow signal indicate?

• The pedestrians have crossed the street, so the drivers can speed up.
• There are pedestrians within the crosswalk.
• There are pedestrians on the sidewalk to cross the street.
• The pedestrians are preparing to cross the street, so drivers must reduce their speed and prepare to stop.
  Explanation:

  "The flashing yellow is followed by a SOLID YELLOW signal, indicating drivers should reduce speed and be prepared to stop."