Imagine just closing King off between Benton and Francis. What a difference that alone would make.
So ... I was reading a bit more about this. This is not a decision yet, but a declaration of intent by the ruling parties in the municipal government.
In any case, apart from bicycles, Oslo has an excellent subway network with over 80 km of track, and over 130 km of streetcar tracks (compare to 68 km and 80 km in Toronto!). In the planned area, there are only about 1000 residents, but almost 100,000 people work there. However, there are also 11 (!) shopping centres of various sizes in the area that would become inaccessible by car. It's actually surprising how few people live in central Oslo, it's quite unusual for a European city -- and quite opposite to the intensification efforts in Waterloo Region.
But 2019 isn't far away and doesn't leave much time for infrastructure improvements. Maybe some bicycle lanes, but even adding street car tracks might be challenging. And will buses still run in the restricted area? I suspect there are some details still to be worked out!
Apparently the idea is for the area inside Ring 1, about two square kilometres.
If buses still run on the streets, they won't quite be pedestrian streets ...