If there is a crossing made of metal sheets on your path:

1. 1Never cross crossings with a metal surface, because this may end in a fall from the motorcycle. Such surfaces are always very slippery.
2. 2As you approach the crossing, reduce your speed as much as possible. At the moment of crossing, do not press the brake and do not add throttle.
3. 3At such crossings, you must be very careful; even in dry weather they can be slippery.
4. 4Answers 2 and 3.