Which is the correct way to pass through a railroad crossing?

1. ①If the barrier is up, you must pass through quickly without making a temporary stop.
2. ②Even if the alarm is sounding, hurry across as long as the barrier has not yet come down.
3. ③Make a temporary stop before the crossing and check that it is safe before passing, but if you are following the signal of a traffic light or the like you may pass without stopping.
4. ④Even if traffic is backed up on the far side, enter the crossing first and wait there.