I'm at the Caltrain station. Only automated vending machine ticket sales. No humans. Machine did not accept any of my gift cards and rejected the only $20 bill I have left!
Fortunately, one of the BART workers showed me the way to a bill changing machine that dispenses $5 bills from twenty's. The worker told me that the Caltrain machine does not accept twenty's but does accept $5 bills. So, I changed my $20 bill for fives and tried the Caltrain machine again for a round trip ticket and it fortunately worked. The fair round trip was $14. Caltrain is operated separately from BART.
Fortunately, one of the BART workers showed me the way to a bill changing machine that dispenses $5 bills from twenty's. The worker told me that the Caltrain machine does not accept twenty's but does accept $5 bills. So, I changed my $20 bill for fives and tried the Caltrain machine again for a round trip ticket and it fortunately worked. The fair round trip was $14. Caltrain is operated separately from BART.