What is the meaning of the following traffic sign?

1. If you see the train’s lights, stop 20 meters before the crossing and don’t try to overtake.
2. Correct answer: Overtaking is prohibited, from the signpost until after the level crossing.
3. Stop at a distance of one meter at least before the tracks and check whether another vehicle is trying to overtake you.
4. Drive faster and cross the railway tracks as quickly as possible. Complete the overtaking maneuver after the crossing.

WhyUnder sign 132 overtaking is forbidden: from this point until after the crossing you may not overtake. The 20 m and 1 m in other answers are made up.