[gregallan]

Interesting, but I wonder what the additional cost to the median income taxpayer would be. Is there a straightforward way to figure this out?

[bombcar]

Yeah, it's hard to do because MTS is mainly used by residents of the area (which extends beyond New York City and even outside of the state).

If it were actually done it'd probably be done as a tax with a credit, offsetting it for lower-income.

I think it'd be interesting to make it part of the driver license/ID (even as an optional fee) so that your DL could be your subway card.