In Tokyo there are underground bike racks. 14% of the transportation in Tokyo is by bikes. It takes 8 seconds to retrieve the bike. these racks protect bikes from damage by weather, theft, or cluttering up the streets. In the US we don't use that many bikes for everyday purposes mostly because our streets aren't set up for them. Most of them do not have bike lanes. I think in big cities that they should create bike lanes and build these bike racks. In my opinion they would be very useful because you don't have to worry about locking your bike up or if its going to rain on it.