Worst thing to hear when crossing a bridge on the tracks is “train.” The lights blind you making it impossible to tell which of the four sets of tracks its on. So we ran the opposite way until we jumped inside a doorway.
At the very bottom of the stairs, there was another tunnel that led downward to a locked door. When the wind blew it forced a draft through the door causing it to continuously slam. It took some bravery to get down to the bottom and see what the noises were. I went by my self.