[sampo]

There is this fairly efficient 10-level parking garage in Philadelphia, Arch Street. It is essentially two 10-floor towers connected at the top. They saved room by making driveways one-way. So you enter, you have to drive 10 floors up, drive across the roof, and then drive 10 floors down to the exit. You can park wherever along the way, but you always end up driving all the way up and down.

[namrog84]

That sounds terrible. I feel like I'd get nausea or dizzy. Thats essentially driving in a circle 20 times.

Itd be okay if there were 2 mid level cross connections

[ChrisIsTaken]

The Sydney Opera House is like this too, it's a 12 story double helix excavated from sandstone.

I'm sure it was fascinating to design, but it's an absolute nightmare to park in.