I'm trying not to be mean but you need to search information by yourself. I have no idea about your local railway services, so I cannot locate the suitable place.
According to
Wikipedia, There are maily three methods in rail suicide. Jumping in front of a moving train. Lying on the tracks to decapitate yourself. And walking onto the track. It's written on Wikipedia that jumping is the best method, but I can't find the source. This forum members seem to view lying as the best method, but I don't know the reasons.
This method is not well documented yet. So it's needed to gather information here and there. I want to help you as much as I can but you still have the responsibility over your CTB decision. Good luck.