One of the most brilliant ideas I've seen in Switzerland is their parking system.
In most large parking garages, each space is equipped with a sensor. When it's occupied, it's red. When it's free it's green. So you never have the experience of making a sharp turn because you think you found a free space only to discover it was just a Smart Car parked behind an SUV.
Better still, most parking garages give you directions on how many spaces are available and where. Here, you've got 13 to the left and 60 more straight ahead.