> "you won't find spots on the lower levels, ... the "x spots open" indicators are lying"

A simpler and cheaper solution would be to fix those availability signs. Surely this is not a problem that a few cameras and some smart software couldn't solve.

Atlanta/Hartsfield just opened a new parking deck with those cameras and I bet some fancy as f### AI powered system. 7 level deck, I tried 4 of them before I realized the green/red lights were just randomly switching back in forth, so the total on each floor never reached zero. Fortunately, the top deck was free.

When I got back I walked past the kiosk that said "type in your license plate and locate your car" for those who forgot where they parked, like I did. Typed it in - no car found. (this was a recent trip, out on 07/23 and back on 07/25)