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Re:Groundbreaking new bridge design could transform rail cro... by crazygringo on Monday June 28, 2021 @07:16PM (#27669581)
I'm guessing it's to minimize the space taken up on the sides of the tracks. Train tracks are often next to things, so I assume that's what's stopping it -- not having available space.
Re:Groundbreaking new bridge design could transform rail cro... by gsnedders on Monday June 28, 2021 @07:39PM (#27669769)
Yes; the current (semi-modular) standard design is typically built as a U-shape for similar reasons. Minimise the span over the railway and minimise land-take on either side (which for the intended application is typically the edges of fields).