MaltaToday : "In 2013 the city of Tallinn in Estonia became the first capital to introduce free public transport for all residents. The reasons were several, including guaranteeing mobility for unemployed and low-income residents, stimulating economic activity, and decreasing the modal share of private motorised transport.
Sustainablecities.eu claims that car traffic in Tallinn decreased by about 15% while the city expects increased tax income of €1 million per 1,000 newly registered inhabitants – an income that will almost compensate for the loss of income from tickets."
