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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Dedicated tracks
High speed trains need tracks with gentler curves and smoother transitions between rails to minimize rattling
They also need to not share their tracks. It doesn’t matter how fast you train can go if it has to spend it’s time waiting on slow passenger trains and cargo trains
This last bit is the problem with Acella in the states. It’s peak speed is a lot higher than the other trains but since it’s stuck behind them all it only shaves like 25% off the overall travel time
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