A BBC Quizz on the London Underground

I don't know if our are familiarized with bbc learning English, a very practical website thought to learn English on the web. This time, you will find vocabulary dealing with this kind of transportation, apart from a video and the text of it. Have a look at this and use the comments option to give us your oppion about travelling by tube in general. If you like it, if you think it is useful, I you prefer other means of transport instead...