Stacking cars

[Coyote]

I can't see it saving anymore space than your typical parking complex. Why do they make them? Security? Cause they can and it looks cool?

[xwhatsit]

No it does save a hell of a lot of space, allowing them to cram in much more cars. The up and down ramps take up a huge amount of space, as does the space required for drivers to back in and out and go in two directions at once.

That particular implementation doesn't look as efficient as some of the others (the rectangular ones especially), they save heaps of space. Precisely why they're using them in Japan.