Car free day?

Of course I went to work by car today- currently I have no alternatives! Personally I prefer to go to work by bus or train, simply because I can read in the meantime. I am not looking forward to the times when I have to drive myself:P and when I move to Oxford I really want to take the train and shuttle bus (20 min altogether) instead of suffering in the traffic. I can enjoy driving and freedom of it over the weekends, if I want to.

I am happy that there is a day when people are made to think about alternative ways of getting to work or moving around town in general. And I am happy it's a European initivative:)
Sometimes we are so trapped in day-to-day reality... What do you think, if you had a choice, would you go to work by bike or a bus?