In several bicycle countries such as the Netherlands and Copenhagen serious bicycle parking problems exist. In the Netherlands for example you can find quite chaotic situations at railway stations (see picture below).
This is subject of serious discussions and something that different (political) parties struggle with.
The problem could at least be reduced if the bicycles could be parked more efficiently. Personally I already had spent some thoughts on the possibility of rotating the steering wheel when parked. Yesterday I came across the Thin Bike (see picture) which illustrated this idea. Seems to work quite well as well. Simple, smart and elegant. Have a further look at: The Thin Bike for a further demonstration