'Green' cars using alternative fuels are exempt from the congestion charge and residents within the zone are offered discounts.
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In 2008 TfL introduced the new low emission zone for lorries entering London. -
Cameras take traffic images which are sent to a central processor. -
The congestion charging scheme has reduced traffic in central London. -
The scheme raises around £150m a year, which is used on public transport... -
'Green' cars using alternative fuels are exempt from the congestion charge. -
The western extension of the zone doubled the area covered. -
Siemens and PIPS Technology cameras are in use. -
ANPR cameras can operate in low light using IR technology.
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