MarcoR
I have never been there, but in public GPS traces, the user went through "Via Regina Margherita" from North to South. On the other hand, on Mapillary there is a photo showing that "Via Regina Margherita" is oneway in the opposite direction (at least on the section between "Via 24 Maggio" and "Strada Provinciale 21 del Piano della Tora").

I'll invert the direction of "Via Regina Margherita" (without touching the tags). That should fix the problem.