What does this sign mean?

• Pavement is milled or grooved ahead. Drive with extra caution.
  Explanation:

  "This road sign is used to inform drivers that the pavement ahead has been milled or grooved, which can affect vehicle handling. Drivers must reduce their speed and drive with extra caution, as the uneven surface can be slippery and may cause vehicles to lose traction."
• Pavement is slippery ahead. Drivers must reduce the speed.
• There is a stopping sign ahead. Drivers must come to a complete stop.
• There is a speed-breaker ahead. Drivers must slow down their vehicles.