Can’t think of a better community to ask.

      • Ada@lemmy.blahaj.zone
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        4 days ago

        It’s both. They’re the same trains in Sydney. It’s mostly an overground network with several underground parts in the city centre

      • WhatAmLemmy@lemmy.world
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        4 days ago

        This style was commissioned starting in the 70’s, when population density was lower, there were fewer trains, and average travel time was higher due to suburban sprawl and most workers employed in the inner city; many spent 1 hour or more on the train each way.

        There’s a new metro project that looks more global.