The tube is already very busy without people using it for frivolous journeys. At least it still costs people money (car) or physical effort (cycling) to use the

The tube is already very busy without people using it for frivolous journeys. At least it still costs people money (car) or physical effort (cycling) to use the roads. There are cities with free transit systems however. http://en.wikipedia.org/wiki/Free_public_transport http://en.wikipedia.org/wiki/Free_public_transport