Ljubljana, European Green Capital 2016, was ranked fourth on the list. In the opinion of the judges, the uniform city card, Urbana, has had a significant impact on the environment as it encourages locals and tourists to forget their cars and use the bus, rent a bicycle and for the city centre which is reserved for cyclists and pedestrians, to hail the electric-powered Kavalir.

Among the solutions from around the world that are included on the list, the Urbana card is one of the few that is already in use, the others are still in the planning or testing phase.