The fare validation was really awkward (and badly explained).
1) Go to fare "Vending" machine (it turns out it is also a fare-subtracting machine, but that isn't how any of us think of it)
2) Tap your card
3) At the lower left corner of a grid of all the usual "add value buttons" but the same size and color, there's a "validate fare" button. Very much hidden in plain sight, undifferentiated from the other buttons. Because I was transferring from the 80, I was offered a strange button where a $0.70 amount stood out, even if the text that said "Validate" didn't stand out.
4) poke that button
5) Did I tap again? I don't remember.
6) Then if you "miss" tapping at the FVMs, you're supposed to enter the front door of the cars and tap the farebox
As a result, nobody 'cept me was seen to pay a fare. I'd say 80% never even tried...expecting to be "asked" and 20% who seemed to hesitate/seek mostly went unhelped by environmental and UI cues (the FVMs don't have a big "Validate Here" look. I'd say I paid only because was determined to figure out how it worked, half from honesty, half as a student of UI/UX.
I judge the system is stupid-bad in all kinds of ways:
1) Why isn't there a big, brightly labelled tap target on either doorpost as you enter the station? Cheap, no screen, just a target, with a ping and maybe an LED (to be ADA )
2) Same for inside the trolley. Are/Arent there supposed to be tap targets at every door?
3) button on the Fare Vending Machine should look very different from the others. Its crazy to "hide" the Validate button among identical "buy" buttons having the same size, color ('cept validate has a smaller font)
4) FVM button should match the look of the physical tap targets Whatever logo / image / color / shape is used. Maybe a bright orange circle. Isn't the FVM just code? Can't you get me a circular Validate button among the rectangle-buy buttons?