What are you required to do according to the following road sign?

1. Correct answer: Slow down and obey the instructions of the workers and of all the road signs in the area.
2. Drive carefully, rough road ahead.
3. Cross the place quickly without disturbing passersby.
4. Driving permit should be obtained from the operating contractor.

WhyAt road works, slow down and follow the workers' instructions and all the signs in the area.