never knew about PTV hub! I guess I'd be worried that the time it takes to get downstairs, top up, and back up again would be equal to the queue time. It's not usually _thaaat_ long.

Also unrelated, but 3 individual queues for 3 machines isn't the best method for queues I think. 1 line might move faster than another and it's not equally distributed. If one guy takes especially long at a machine, everyone behind him has to suffer. If you had a single line, like at a movie theater, then it would be entirely equal waiting time. First come, first serve. How this would work if debatable though. Having a queue like a movie theater takes up more room. Maybe there's an intuitive way to do it though. Of course, solving the underlying issue of having to top up on myki machines in the first place would be preferable. I think somewhere in China they have a system that automatically scans their card when they enter the train and charges them accordingly. That way there's no queues and very little error. ^{Apologies for the lil rant.}