What does this sign signify?

• The road ahead is closed during wet weather.
• Drivers should increase speed to avoid slipping.
• The pavement ahead has been grooved to reduce slipperiness in wet conditions.
  Explanation:

  "This sign is used to inform drivers that the road surface has been intentionally grooved to improve traction and reduce the risk of vehicles slipping during or after rain. It's a safety measure, and drivers should continue with caution, especially in wet conditions."
• Wet weather is expected ahead.