[wtallis]

That example only demonstrates leaked information of the drivers, not the passengers/customers. And the "anonymized" driver and license data wouldn't need to be released in any form at all to produce a dataset useful for public transportation planning purposes: approximate time of day and approximate location are sufficient to estimate demand, and there's no need to keep track of who is making which trips.

[jadyoyster]

Exactly, all you need to start is "a significant amount of people from this area want to go to those areas".