HuffPost : "The university city of Tübingen, in southwest Germany, is testing free public transportation for all residents. Two weeks ago, the city began a two-year pilot project using its own funds to provide free rides on Saturdays.
For seven years, local authorities have been trying to provide unlimited public transport, free at the point of access, for a flat 15-euro monthly tax for all residents, Mayor Boris Palmer explained. To do so would require a change in law."
