
okay, i think after my initial ideas regarding to metro station platforms was not applicable since the metro lines are on different levels, the new one i made only for juctions of metro terminals and some certain train stations adjacent to a tunnel, possibly now takes the cake. The reason is that the new system i developed has no need of energy, just the repulsion power of the train is essential here. As the train approaches to our system, the units contructed on both tunnel and the train will push up the flaps high, and whenever train passes by the flaps will up and then down without any need of energy.

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