- 8,727
What do you mean with "usual"?
You don't want to tell me that Chamonix, Grand Canyon, Citta di Aria and Costa di Amalfi weren't narrow? If I remember correctly, they said you can change the witdh of a track, pretty sure you will be able to make it as narrow as a normal public road (or like Eiger), that's good enough for me.
Eiger's "too wide"; Citta di Aria is on the money, though 👍