It can’t work, as shown in this video. Balancing and steering are in exact opposition in zero gravity. Whaddayaknow. By the way, the video also shows nicely why you need space for turning on bicycle lanes: in order to lean you need extra breadth, and the sharper the turn, the more the lean and thus breadth and thus a wider lane. Something that non-cycling countries have yet to discover when they put in those narrow and twisty bike paths.