A train isn't the most dangerous object when navigating your bike across RR tracks.  The tracks themselves can come up and bite your front wheel if you aren't careful! 

A quick note of caution when approaching RR tracks: Hit them head on, even if that means to swing out a bit.  Give audible cue and / or hand signal those around you and hit the tracks at a 90 degree angle.  Two folks I know went down just this week.  Both got their front wheels down inside the tracks and in a split second were on their faces on the ground.  Both are going to be fine but have substantial bruising and some road rash.  Each rider has logged countless miles but just got a little careless when approaching the tracks.  One more thing to consider at newer crossings: the rubberized skirt on either side of the tracks is incredibly slippery in the early morning from dew or during rainy days.  All the more reason to swing wide and take them head on! 

Cross with care!