It should be remembered that a city like Amsterdam is an 'inside out' city, i.e. much more of the big commercial buildings etc are built on the outskirts while the centre is to a much greater extent residential and historical buildings etc (because of the limitations on building on unstable foundations). That makes the centre far quieter in terms of traffic than other cities and contributes hugely to making it a possible to have the infrastructure they have.
It should be remembered that a city like Amsterdam is an 'inside out' city, i.e. much more of the big commercial buildings etc are built on the outskirts while the centre is to a much greater extent residential and historical buildings etc (because of the limitations on building on unstable foundations). That makes the centre far quieter in terms of traffic than other cities and contributes hugely to making it a possible to have the infrastructure they have.