What does this sign indicate?

• The road is permanently closed for 8 kilometers.
• Drivers must exit the highway immediately.
• There is an alternate route for the next 8 kilometers due to roadwork or obstruction.
  Explanation:

  "This sign indicates a temporary traffic change, usually due to construction or maintenance. The phrase "Detour Next 8 km" means that an alternate route has been set up for the next 8 kilometers, directing drivers away from the affected area."
• The speed limit is reduced to 8 km/h.