Cycle campaigning

If the Mayor of London, who has executive control of TfL, does not have the power to sort out the traffic infrastructure of this city, who on earth does?

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We keep blaming infrastructure which distracts from looking at what people do. If a driver turns left and isn't 100% sure that it is clear on their left, either because they haven't checked or because their vehicle design makes that check impossible they shouldn't turn or be riding such a vehicle. End-of. Whatever the infrastructure