We don't have the delta cost to do a full fast train, but allow me to be more precise.
I think we're embarking on a false debate about what is frequent and what is fast. There are many definitions of what a TGV or a fast train is out there. The reality is that the proposal is to build a train that is as frequent, as fast, as reliable and as economical as possible.
Is it 200, 210 or 225? We will define what it is and what is optimal in the corridor to serve what we think will be 17 million passengers in 20 years from now.