An interesting article that links back the fact that Alstom's TGV cannot run on legacy Italian line to the original turbine train design of the TGV, before the oil shock (the one of the 70s).

Rail path dependency: how the oil crisis and the British government left SNCF with a problem in Italian tunnels
When writing my previous post about the loading gauge of SNCF's Alstom built TGV-M Avelia Horizon train being too large for Italian tunnels, I had this nag in the back of my mind: how did they get themselves into this tangle? And it is not the first time I have