What does this sign indicate to a driver?

• The driver should look for construction equipment in 1500 feet.
• Road construction is ongoing 1500 feet from the sign, and drivers should be cautious.
  Explanation:

  "Road construction is ongoing 1500 feet from the sign, and drivers should be cautious."
• The road will become impassable in 1500 feet due to construction.
• Drivers must increase their speed before reaching the construction area.