Parallel Lies by Ridley Pearson
When Umberto Alvarez's family was wiped out in a terrible train accident, he lost everything that he held dear in this world. Consumed with hatred for the train company that caused the tragedy through their negligence, he tries to get recompense every legal way he can. But in vain. He has no choice but give up all he has left by getting revenge personally. He leaves his life, rides the rails and starts a campaign of sabotage and destruction. Peter Tyler's life is also on the rocks. His career is on hold after a series of screw-ups, and he has been reduced to working transport for the FBI. Now he sees Alavarez - the Railroad Killer - as HIS chance for redemption. And so begins a cat-and-mouse game across the North American continent.