What does this sign indicate?

• Vehicles are no longer restricted from passing other vehicles.
  Explanation:

  "An "End of No Passing Zone" sign marks the point where the restriction on passing other vehicles no longer applies. Prior to this sign, passing is prohibited for safety reasons, such as on curves, hills, or areas with limited visibility. After the sign, drivers are permitted to pass other vehicles when it is safe to do so."
• Vehicles must continue to refrain from passing other vehicles.
• Only trucks can pass other vehicles from this point.
• Passing is allowed only during certain hours.