City Traffic Simulator is, in fact, a tram sim; that is, you operate a light rail car in an invented European city.
There's a bit of a sim/tycoon aspect; you don't lay new lines, but you earn money by transporting passengers, with which you may purchase new tram cars. You start with the ability to run only one of several routes in the city, and unlock new routes by successfully transporting some number of passengers of different social classes.
