[mazelife]

Seconded on the DC Metro. Flat fares would improve the experience greatly. Not only would it make it easier to calculate how much you need, but it would avoid the hideous backups that occur at many stations when the flow of people exiting the station is constrained by the fact that everyone has to scan their card again before they can get out. The idea gets proposed quite often, but it never goes anywhere. I recall reading something a couple years ago though that said for a flat-fare system to be revenue neutral in DC, the fare would have to be $2.90. Apparently the concern is that that would end up decreasing ridership, particularly among people who are just traveling around the urban core of DC.

[oh_sigh]

There could be an "unlimited ride" card, like NYC has. It would work out to be about $125/month if that $2.90 is accurate compared to the $2.50 for NYC and everything else being equal.

[Scoundreller]

The system being implemented on the commuter trains in Southern Ontario Canada allow for riders to set a "default exit", so when a user doesn't tap-off, the system assumes that's where they got off the system.