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SYLOH t1_iy7kiyd wrote

Reply to comment by breckenridgeback in eli5 Why are bridges always set at the same level (straight rather than one side shorter than the other)? by birdnerd1991

Maybe a bridge constructed in the 1930s had such limitations.
But modern suspension bridges often are built tall enough for ships to pass under, with ramps that get that high on either end. They don't really care if the height change on the ramp has to be small or large on one or both ends.

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