Poka Yoke Parking Lot

Why bother giving "tickets" for expired parking meters if you can just prevent the driver from taking off in the first place until the money is paid?  Tokyo's "poka yoke" (error proofing) parking system prevents unpaid parking problem by simply "locking" the car with a computerized plate mechanism that is raised when the car is parked.  The only way the driver can actually leave the parking spot is to pay the full amount due, which is tracked by a sensor/timer when the car is first parked.  Completely automated and error proof ... only in Japan!