To watch video click on this link. Part way through, about 5m 29 you will see how congestion and hence pollution within the city is limited by controlling traffic lights to prevent vehicles entering until there is “space” for them. It turns out that the cars are not delayed outside the city, any more than they would be inside the city.
See the above part at 5.29 for a description of how cars are queued outside the city, rather than inside
Trams trundle unobtrusively through high end shopping pedestrian areas
Schedules to die for
Cyclists have learnt not to cycling directly into the rails, just like they know to avoid kerbs in UK