it does work there is one in manchester works on the same idea drive your car in and get a ticket which say which bay its in and when you collect put your ticket in and your car is deliverd fully automatic.
I hate to burst anyone's bubble but it isnt a photoshop its real, I'll find the link to prove it but Volkswagen own it and I think from memory its for their workers at a plant.
Definitely a real place though so it must work, aswell as in rush hour