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

1. Correct answer: Slow down and prepare for a possible stop if necessary, before the railway tracks.
2. Stop 2 meters before the railway tracks and check if a train is approaching.
3. Drive faster and quickly cross the railway tracks.
4. If you see the train’s lights, stop 30 meters before the railway tracks.

WhyThe board warns of the crossing in advance: slow down and be ready to stop before the tracks. The rules do not require always stopping 2 or 20 meters away.