What does the "STOP/SLOW Paddle Sign" mean when used by a traffic controller?

• Drivers must stop when the "STOP" side is shown and proceed cautiously when the "SLOW" side is shown.
  Explanation:

  "The "STOP/SLOW Paddle Sign" is used by traffic controllers to direct vehicles in areas like construction zones or emergencies. When the "STOP" side is displayed, drivers must come to a complete stop. When the "SLOW" side is displayed, drivers are required to proceed slowly and carefully through the controlled area."
• Drivers must always stop regardless of which side of the paddle is shown.
• Drivers may ignore the sign if the area appears clear.
• Drivers must only slow down when either side of the paddle is shown.