574km/h !
Just watching this live on French TV. It's impressive to see the live images from a camera on the train roof aimed at the pantograph contact with the overhead wire at 550km/h! They're using a jet aircraft as a chase plane to relay the TV images.
Stunning to see it _cornering_ at 570km/h, and it has just peaked at 574.7km/h, before starting to decelerate.