> in addition to taking more time, was not very comfortable for the people living there.

That’s quite the understatement. I remember taking one hour to get to the bottom of the valley from the Larzac, and then one hour again to get back up on the other side. We’d often stop for lunch or a coffee in Millau just to do anything at all that was not sitting in the car, but the city was entirely choked by this overwhelming traffic. The viaduct was a massive improvement. And sure, it affected local restaurants and bars, but the city is much more liveable now.