Trains

Yeah so for some crazy reason I thought public transport was great. People always seem to be complaining about over-crowding on morning trains but somehow I was lucky my first couple of times. But, now all of a sudden our number of carriages has halved. I believe the word sardines sums it up nicely. Good thing its only a short trip. I wonder why though, is there some fickle god of trains that suddenly decides that it is a good idea to roll the dice for the number of carriages, or is there a good reason?