> Under California case law, Tucher said, “standing on a BART platform waiting for a train to arrive does not establish that the carrier, before it has taken affirmative steps to accept a passenger onto a train,

Im confused. With BART, once you are on the platform, you have scanned in and begun to pay. If you scan right back out in the same station, they charge you. If they have taken your money and you are somewhere you cant get to without paying, I think the "ride" has begun