So I wonder if they will re-do the stations or re-do the trains. It seems the older stations which are too narrow would probably benefit from an upgrade, but I could imagine they might not have the space to make them any wider than they are now.
It's literally a four line article, and one of them is "Construction work has begun on widening hundreds of platforms."
They're going to first spend €400m upgrading their train station platforms by widening the space for train tracks, and then later we'll find out on Hacker News: "200 Upgraded French Train Platforms 'too thin for pedestrian traffic'".
Right, the french pedestrian network will have failed to communicate the correct specifications to the platform operators.
Most subway stations I have frequented can certainly afford losing 10 or 20 centimeters of platform space so I wouldn't be too concerned.