What does this road sign indicate?

• The road is closed due to construction work, and no vehicles are allowed to pass.
• Workers are present on the road, and drivers should proceed cautiously at the posted speed limit.
  Explanation:

  "This road sign alerts drivers to the presence of workers on or near the road due to ongoing construction or maintenance. Drivers are required to proceed with caution, adhering strictly to the posted speed limit to ensure the safety of the workers and other road users."
• Drivers must stop and wait for instructions from roadwork personnel before proceeding.
• The road is open without restrictions despite ongoing construction.