• Hagdos@lemmy.world
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    2 days ago

    It’s possible to upgrade a line like that, but it will involve a lot of cutting through hills or building bridges over valleys

      • Hagdos@lemmy.world
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        1 day ago

        It could take the same route, just flattening out the hills and valleys.

        If there are sharp corners that might not work, but even lower speed rail doesn’t really like sharp corners. They can be mitigated up to a certain point with banked curves.