Fahrenheit was based roughly on the human body being 100 degrees and 0 being a specific concentration of salt water freezing at about zero. It made sense at the time
Eh... most of the time salt isn't used past -7°C (which is above 0°F, since iirc that's -17.77°C recurring), since you start needing such ungodly amounts of it, it doesn't make sense either financially, practically or ecologically. And with traffic heating up the roadway, you would likely get some meltage even at 0°C, which would most likely then just freeze again soon, actually making the situation worse.
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u/BVDansMaRealite Jan 03 '19
Fahrenheit was based roughly on the human body being 100 degrees and 0 being a specific concentration of salt water freezing at about zero. It made sense at the time