Not sure of the exact details, but it looks like Alstom figured out accessibility and double deck coaches on the new TGV M
Accessibility to every area of the train for all passengers. This is the first TGV to be designed in close collaboration with wheelchair user groups from the very...
I wanted to add, I think the Caltrain catenary is also constant tension! When driving by the construction in San Mateo today, I could see pulleys and weights on some of the poles.
The seat sliding forward is a better method of recline, so you don't get a seat back into your face! .... I think the main thing is the amount of recline, and the seat cushion