A road was re-qualified as pedestrian, but a part of it is still drivable for local.
I was able do split the road in two parts.
But I had to add a new road path for vehicles.
And alter the pedestrian path elsewhere (where there is a pedestrian path) in the same area.

The idea is to split a road or a pedestrian path in two or more and be able to switch from one to the other on a part of the path.