Police have stopped just over 100 cars in Hertfordshire to crack down on drivers with faulty number plates.
Hertfordshire drivers were top of the list over six counties, after 101 cars were stopped in comparison to the lowest ranking county, Essex, with a total of only 19 cars being stopped.
This was during an Automatic Number Plate Recognition (ANPR) operation, which aims to limit the number of unsafe drivers on the road with faulty number plates.
This operation took place between July 16 and August 5 in order to bulk up security in the run-up the Olympics.
In total, 303 cars were stopped and Hertfordshire is said to have come out on top because it has more roads in the county.
Inspector Colin Bonner, from the Bedfordshire and Hertfordshire Roads Policing Unit said: "ANPR is a significant weapon in our bid to fight crime and protect the public.
"Using this technology the police across the region are helping to remove serious criminals from the roads, as well as unsafe and uninsured drivers and vehicles.
"Those who are using an illegal number plate on their vehicle will be pulled over and could face a fine of up to £1,000."