A method for providing information relevant to using a public transportation system (PTS), the PTS comprising a plurality of PTS vehicles, the method comprising: receiving, at a server, data relevant to the PTS responsive to a first user of a PTS vehicle via a first user's communication device while the first user is using the PTS vehicle, the received relevant data comprising data descriptive of socially relevant features of users of the PTS vehicle; providing, on a second user's communication device, data responsive to the received relevant data.