[ambrose2]

Definitely a high trust city (Vienna), but note that a few times a year they do check for tickets.

Because the monthly pass rate is so low, most people have purchased the pass on their phone and that must be shown a couple of times a year or else you’ll be charged a fine at the checkpoint. I’m actually surprised that the evasion stats are so low, since the fine isn’t terribly large and you might come out ahead just never paying the fare and only paying fines.

I have to say though, that system of spot checks makes the day to day very low friction.

[CalRobert]

The first time I visited Vienna I noted the complete lack of fare control and thought "wow, it's great they've made public transport free!" My hostel was kind enough to disabuse me of this notion, though.