>> like a raised “ bridge” To let traffic through and still allow the water to
>> run under?
Isn't that pretty much what a ford is?
Under normal conditions the water flows (mostly) under the bed of the ford. Only in flood is there significant water over the ford. At some point, just like water flowing off fields as happens round here, the water is too deep for a car to wade. If you're lucky it just floods the ignition and cuts the engine out.
Unlucky and the engine sucks in water and, on the 'squeeze' stroke obeying the laws of physics water won't compress and con rod breaks.
If you're dead unlucky:
www.theguardian.com/uk/2012/oct/23/judge-drowned-drove-flooded-ford
Several of my colleagues knew Jonathan Gammon...
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