The Brompton is a special kind of bycicle and is a so-called folding bike.
This means, that it can be folded in a minimum of time (less than one minute!) to a small packet,
which can be taken for free into public transport
More details on the technique of the bicycle can be found on the german webpage
Everthing important is said on this webpage, so I will limit myself to show some pictures of my Brompton
travelling around the world.