There are so many exemptions and discounts--e.g., for taxis and private hires and residents---that only a fraction of traffic is charged. Also, London has chan

There are so many exemptions and discounts--e.g., for taxis and private hires and residents---that only a fraction of traffic is charged. Also, London has changed its road network a lot to favor buses, pedestrians and cyclists. Speeds today are about what they were in 2002 before pricing, but there is more capacity for other modes. Also there is tons of road construction in London all the time. That harms capacity a lot.