Operations and Technology
Whilst TfL is responsible for the scheme, the operation is sub-contracted to a number of outside companies. Since 2009, IBM has been responsible for the day-to-day operation of the charging system, whilst Siemens Traffic Solutions provides and operates the physical enforcement infrastructure. Transport for London announced that from 2009 IBM will operate the charge, along with the low emission zone under contract.
The scheme makes use of purpose-built automatic number plate recognition (ANPR) cameras, manufactured by PIPs Technology, to record vehicles entering and exiting the zone. Cameras can record number plates with a 90% accuracy rate through the technology. The majority of vehicles within the zone are captured on camera. The cameras take two still pictures in colour and black and white and use infrared technology to identify the number plates. The camera network and other roadside equipment is managed largely automatically by an instation system developed by Roke Manor Research Ltd, which delivers number plates to the billing system. These identified numbers are checked against the list of payers overnight by computer. In those cases when a number plate has not been recognised then they are checked manually. Those that have paid but have not been seen in the central zone are not refunded, and those that have not paid and are seen are fined. The registered keeper (The registered keeper is presumed to be the owner unless shown otherwise) of such a vehicle is looked up in a database provided by the Driver and Vehicle Licensing Agency (DVLA), based in Swansea.
Read more about this topic: London Congestion Charge
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