According to the press release:
100 years of transportation history across four of Europe’s great cities and it’s yours to play with! Four of Europe’s most exiting cities with unique transportation challenges are now your play things. Paradox Interactive and Colossal Order Ltd are proud to announce that Cities in Motion, a mass public transportation simulator, has now hit retail in Europe for a suggested retail price of $19.99/€19.99. The game is also available for digital download across all major platforms. The game will be shipping in France on March 17.
A demo is currently available from the official site here.