I doubt the climate in Netherlands is comparable. A week here and there with snow doesn't even compare. The pro car ban people mostly argue that if only the public transportation gets good enough, cars aren't needed. That remains to be seen IMHO. Until then I believe the shopping malls with parking outside the cities will grow bigger, families will be moving out, and eventually city centers will become less lively (like many places in the US, good for office space and lunch, dead in the evenings). Time will show. Regardless of this, I believe it is possible to have space for both bicycles and cars, although the people in charge of Oslo after the last election disagrees.