I read about wheel protection ... may depend on country though. You don't want your flesh stripped, do you ?
What I got - train must be at a speed of at least 100 kmph, stand (or jump) in the middle of the tracks, full contact with front/middle of the train, do not flinch or hesitate. With the proper body composition, body position, train front and train speed mass versus mass should splat you like a fly. Well, a bit less. A lot could go wrong. Imagine the impact of an object at a speed of 200 kmph with your body.
It could go wrong.
A bitch for the driver, though.
Per your method: aside from possibly having your flesh stripped (may depend on the train), what if you get hit you bounce off /lose body parts ? Survival can be a bitch. Investigate the local train/rail system if you have to.