As it turns out it doesn’t actually cost that much on regular transit, there’s an AIRPORT SURCHARGE because it’s an “airport train”.
No wonder Americans don’t use public transit, even when the system exists it’s ridiculously difficult and expensive to use.
I once went through a BART gate line by mistake, I was trying to get to the trolley service and misread the signage. I immediately exited. The charge: $6.20. Still can’t believe it.
Use cash.
I walked off the train into a depowered station at night and couldnt scan off at the station, so I got on a bus and it depleted my card, then the next day I got a ticket for riding the bus without paying because the computer stole all my money and the guy giving me a ticket couldnt care less that I actually payed more than I should have but just kept repeating that I “should have had more money on the card”
I did this once in Tokyo, besides a stern looking at I didn’t have to pay anything.