in the ep4 in the armory , Vernon toke a look from outside and he ask about the railroad why did he ask ?
well there is two possible reasons for that but i'm sure
1- i think he saw a a lot walker came from the railroad the same thing happen in the series in season 2 cuz the train make a loud noise as you know
2-he trying to escape or do you something of the train
tell me you opinion
sorry for bad English