 "The average speed at which personal car users (private cars) reach their destinations directly depends on the speed at which their designated destinations reach the users of dedicated / non-public transport.According to Downs, the link between average speeds on public transport and private transport applies only "to regions in which the vast majority of peak-hour commuting is done on rapid transit systems with separate rights of way.Central London is an example, since in 2001 around 85 percent of all morning peak-period commuters into that area used public transit (including 77 percent on separate rights of way) and only 11 percent used private cars.