What City Has The Best Public Transit?

Public transit sucks nearly everywhere. But every once in a while there's that rare place where the system is clean, on time, and just a joy to use. Where is that place?

As far as I can tell, Switzerland has some of the best public transit that I've ever seen. In Zurich, the trains are clean and on time, even the train in the airport has a speaker system that plays the sounds of the countryside. It's beautifully clean and gloriously on time.

What say you? What city has public transit that isn't pure hell?