Yes...
* Levels of traffic in London have fallen sharply at a time when overall car ownership is rising
* More people are now using environmentally-friendly transport such as buses and Tube trains
* Traffic congestion in central London is not as bad as it was a decade ago
No...
* Business leaders say that the congestion charge has adversely affected the takings of retailers
* The capital's streets have not been transformed – despite the reduction in traffic jams
* Not as much as cash has been raised from the congestion charge as was originally hoped