For all you would be Supply Interdictors, I have been meaning to share this tidbit I picked up a few weeks ago.
To kill a train without too much fear of train ack... drop bombs on tracks in front of locomotive. Train will wreck.
To kill a complete convoy... destroy first truck. The rest of the convoy will crash into him.
I'd like to give credit to the well known Knit I picked these tips up from... but I'm drawing a blank on his handle. I'll edit if I remember.
