When you are dead & your heart stops, you are no longer pumping blood. Yes a very clean cut, must have been waiting as it appears he didnt jump but placed hemself on the track. A lot less mess than the usual train jumpers!
No. He was already dead. Your heart beats still. There would have been much more blood. All I'm going to say is trust me. ME ;)
It looks like the body was moved there. There wasn't any blood anywhere and the rest of his body looked ok. It doesn't look like he was run over by a train, but he definitely looked dead.