What does a fluorescent yellow-green background sign indicate?

• It marks a no-entry zone.
• It warns of a pedestrian or school zone ahead.
  Explanation:

  "Fluorescent yellow-green background signs are used to alert drivers about areas with increased pedestrian activity, such as school zones, playgrounds, or crosswalks, where they should exercise extra caution."
• It provides directions to the nearest hospital.
• It indicates a speed limit change.