On the 17 February 2003, a charging zone was established around the central part of London. The reason was huge problems with congestion, reduced travel speed and increased delays. The decision to introduce road taxes was based on extensive analytical work and a number of public hearings.
The charged area covers approximately 21km2, which covers a significant part of the most congested streets in London.
In 2007 the charging areaÂ was expanded toÂ cover Kensington, Chelsea and Westminster - the so-called Western Extension.Â However, this extension was removed in January 2011 at which point the daily taxation also rose to 10 Â£.