You might have been lucky. The "metro" in Cologne is notoriously unreliable, to the point that there's even a word "KVB minutes" to explain why sometimes the tr

You might have been lucky. The "metro" in Cologne is notoriously unreliable, to the point that there's even a word "KVB minutes" to explain why sometimes the train will be arriving in 2 minutes for about 10 minutes.