According to BBC News in London congestion is down 21%, bus use up 23% and cycling up 83%, though I don't know how they got those figures.
It was said in a news item on growing congestion in India that "cars cannot meet the transport needs of the majority of the (urban?) population", and I think that should have been known here and tackled more effectively a long time ago. Ironic that roadbuilding and improvement has increased road use by cars etc. which government now want to reduce by charging.
They're supposed to be improving public transport before the charge can be introduced, but I don't see how that will take the strain and increased bus numbers may reduce some congestion but will increase air pollution, very bad for cycling and city dwellers' health.
A local news item reported taking 40mins to go 3.5 miles on the M60, thats 5.25mph.
Still, its an opportunity for electric bike rental from the M60 (outer zone boundary) or A6010 (inner zone boundary)... on fair weather days at least

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Stuart.