Poitiers - Limoges is a short route across flat country. Given the size of limoges and what that would mean for that region, I'm surprised that such a relatively cheap spur has been abandoned.

keep to the Fen Causeway

I see in a link to the article that the department of Haut-Rhin organised an on-line signature collection against the cull of the LGV Rhin-Rhône branche est, with over 13,000 signed.

_{*Lunatic*, n.
One whose delusions are out of fashion.}