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As you probably know by now – the way a car park LPR (License Plate Recognition) system works is:

At the entrance to the car  park a camera captures the license plate and saves the entry time and plate number in the system. When the vehicle approaches the exit, a camera again captures the license plate, the system then calculates the amount of time parked, and the driver is shown the amount owed. This system works great when the camera accurately captures the full license plate at both the entrance and exit to the car park.

But what about when the camera can’t capture the full license plate? 

The traditional approach to this issue is to give everyone a ticket. Because if a vehicle with a problematic license plate approaches to a ticketless terminal, it would have to be dealt with manually. Instead of using the license plate number, the system uses the ticket to calculate the time parked. The problem with tickets is they are an added expense, the printers need maintenance, they create traffic in the lanes, they get lost, and they create a mess.
The end result is when you have a traditional ticketing parking system, due to all the maintenance needed (a check-up approximately every 1000-5000 vehicles), its only a semi-automatic parking lot.