I am talking about Shinkansen or their French or Chinese analogs. What technological advancement in the recent years allows them to travel so fast? Where I come from most trains don’t go nearly at that fast speed.
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The main aspect that allows it is track design.
It isn’t hard to build a train that could go so fast, simply put a very powerful engine into it.
But that isn’t able to safely drive on a normal train track. High speed connections have to be very straight, any curve that is too strong could derail the train. Same for little height differences and so on, it just needs very precise engineering.
In theory we could get even faster with an even more powerful engine, safety remains the limiting factor.
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