If coming in to Italy from leaving France, to park the truck in Aosta, you will see the leisure centre buildings with the swimming pool.
Exit at any motorway junction and park near the leisure centre .
Then walk to the cable lift , there is coach parking there, not sure about lorry parking by the cable lift .
Or park in truck stop on motorway, there: is a long walk next to the river, it goes past a prison, which was not pleasant as the inmates shout out of their windows .