Data is - I believe - currently held on Conveyal's (the consultancy spearheading this) db. As I understand it, this has been developed in tandem with some World Bank initiatives and a test version of this is already operational with traffic data the WB has accrued in a number of international cities. Recent pushed wrt this project have been aimed at getting US cities on board, which (from personal experience) is much, much harder than getting buy-in on this type of work in cities abroad.

And wrt anon data versus specific trip data - that is anonymized when the trips are uploaded to the system. There will be no way to identify specific trips with the tool.