[mahkeiro]

A TGV Duplex carries 510 passengers at 300km/h. For instance the TGV line going to south east France carries 75000 passengers per day with a theoretical capacity at 350000 passengers per day. I let you convert that into airplanes ;)

[local_crmdgeon]

Air France domestic backbone is home-grown a320s. Standard layout in their use of those is 174 pax.

TGV Sud-Est is 350000 / 174 ~= 2012 flights per day.

There's no airport in the world that handles traffic like that. ATL comes close at 1970 flights daily, but this 2012 is only the capacity on TGV Sud-Est. This doesn't count any of the other lines, of which there are many: https://en.wikipedia.org/wiki/List_of_TGV_services

Trains are really intense.

[Scoundreller]

France’s train network is pretty good if you’re going towards or away from Paris.

But if you’re going from Brittany (in the NW) or Nantes to the SW (Toulouse or Bordeaux), driving is going to beat the train.

[mahkeiro]

There is direct train between Nantes and Bordeaux, but you are right driving is about 1:30 faster.