Trains (whether its a subway/tube or a regular locomotive) travel very quick, and when approaching a station, they need to slow down to a stop.
Why not have the station be built slightly elevated from the tracks? so as the train approaches, it has to climb an upward slope (and therefore trade kinetic energy for potential energy)?
And then when it leaves the station, it can more quickly accelerate and gain up to its target speed? Wouldn’t this be more efficient?
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In: Engineering
Trains often use regenerative braking, similar to electric cars. But instead of saving that energy in a battery it is just fed back into the grid. This way they can slow down and return some of their kinetic energy to the grid.
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