Yup. The downgrading of the Main road to stop large vehicles and the making of the Kennet avenue rd into a one way road is all good stuff.
With less traffic Avebury could become much more atmospheric.
Perhaps making all roads into Avebury "access only", i.e. for residents and deliveries, would be the perfect answer. That would include the road beside the Avenue, obviously.
Regards,
TE.