There is seems to be some unwritten requirement that the door will only open once the person approaching has stopped this avoids confusion for partially sighted with a moving object. It might be a optical based sensor we don't know
The TGV has a handle you turn but the door will close on you if you are not quick about it, its painful
In the event of a fire or smoke entering the cabin the train manager can seal each coach and shut down the external air conditioning that requires the partition doors to close so you really shouldn't leave a terminus with a shattered door
Owing to serious issues raised in recent accidents in the UK where passengers where unable to break through the partition doors, they now have to be breakable and also that the partitions slide in opposite directions at each end so if the train rolls over at least one slides or is easily openable
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