Different anyways, is that the ticket tells you where to park. It will keep track of what spaces are used, and when you check out, it is marked as free.

Sometimes people may park in a way that they occupy more than their assigned spot, so I would argue against the hefty fine for people who can't park in their pre-printed spot. But just having the system 'know' where the free spots are and providing some signs to guide you to the nearest free spot would be great.

I read a great one about a garage that uses storage tech to 'park' the cars. Drivers pull onto a platform, get off, and it is elevated and moved to an empty spot. The garage has narrower aisles because the cars don't need to turn, and lower ceilings becuase the drivers are already out. It costs big $$ to build, but it can hold something like 2x or 3x the cars in the same space. They built a test one in NYC.

They've got something similar where I live. At the entrances to the city there are signs for the various car-parks, which have an indicator saying how many places are free in each car park. Then you can choose to go to the one with spaces left.
You can even look this up on line.

What you want is a similar system within each car park to tell you which floors or sections still have spare space.
Complicated RFID tags or having to go to a specific palce are not needed, you just count cars in and count cars out.

P.S. Many years ago in Leeds they had a similar system on double-deckers buses. A display downstairs showed how many seats were left upstairs. It worked by a switch on the stairs counting people going up and coming down.