Transit vouchers go from plastic to paper

I imagine a costs-savings over a plastics-savings, but the word from Washington Metropolitan Area Transit Authority (WMATA) is that plastic SmarTrip vouchers were being replaced with paper ones, beginning last month.

We don’t get vouchers — among other things, I administer transit benefits for work; this information is behind a login — and WMATA will use the plastic until the stock is exhausted, so I don’t know if the change is in effect.

Help needed: FOSS for public transportation systems

Do you know of free and open source software (FOSS) for managing public transit (public transportation) systems? Especially small, bus-based systems. Perhaps I don’t know the lingo well enough, but all I can find are expensive, proprietary systems. You would think there was a need.

As in earlier requests, pointers to good association or government sites, or thoughtful blogs, are also welcome.