This road is a bit of an outlier. It used to be the main road through the valley, but as you can see, a replacement tunnel has been built. While it seems to be legal to drive a car on this road, it is expected that most cars would take the tunnel. And, since cyclists are a hazard in tunnels, they are routed over this old road. So in practice this will mainly be a used as a cycleway. Should that impact tagging? Not sure.