My group of friends and I are fucking pro at this game, we all have Aks's and atlas packs with a shit ton of medical supplies and the best stuff you can get, and have been alive for days now. Surprisingly we've only come across 2 humans, but never any real scary situation with them. The scary part about this mod is that you're probably always being watched, luckily our group is of 3 people including me, and I'm pretty sure people don't mess around with groups. It would kind of suck to be by yourself in this mod.
Edited:
Well yes, zombies don't really pose a threat to a train, but debris, malfunctioning or non functioning switch tracks, and failing infrastructure do.
I don't picture a train working too well just because of the danger of other humans waiting for the train to arrive at some spots.
alice