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Difference between a bridge and a culvert

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Dirt Roads:

--- Quote from: roadman65 on May 29, 2023, 10:36:25 PM ---What would the high fill over Veterans Memorial Highway and the creek running next to it at Horseshoe Curve, Altoona, PA be called?

I consider it a tunnel even though the hill above it was man made.

The local road agency calls it an underpass.

--- End quote ---

The B&B folks on the railroad (in this case, Norfolk Southern) would call it a culvert.  But railroaders do tend to refer to grade segregations as underpasses and overpasses.  [B&B means the railroad's Bridges and Buildings Engineering Department].

Road Hog:
To me, if it has piers, it's a bridge and if it doesn't, it's a culvert.

Big John:
^^ Not a culvert:


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