Killing or letting die

You have just one minute to make an agonizing choice. A runaway train is hurtling down the track where you are standing. Further down the line, too far away for you to reach, forty men are working in a tunnel. If the train reaches them, it is certain to kill many of them. You can’t stop the train. But you can pull the lever that will divert it down another track. Further down this line, in another tunnel, only three men are working. The death toll is bound to be smaller. The rails are humming and the engine noises are getting louder. You have only seconds to make a choice. What would you do? Justify your answer fully.

Answer: Divert the train to the other line and warn the 3 men. =)

Justify:Based on facts from the question itself. It certainly says its too far to reach the forty men "Further down the line, too far away for you to reach, forty men are working in a tunnel." Whereas as for the 3 men, the question didn't state that I am too far away to warn them "down this line, in another tunnel, only three men are working.".

Conclusion: Just divert the train and warn the 3 men. If they ARE indeed far away. atleast the casualties are lesser? hmmm....