A wise person once told me the formula for avoiding hydroplaning. It involves math, so I don't drive more than 55 mph when the roads are terrible.
Here's the formula:
Nine times the square root of your tire pressure equals the vehicle hydroplane speed in MPH.
Now, it looks like I've been going too fast; as my tire pressure is 22 psi. According to my calculator, the sqrt of 22 is 4.69. Multiply that by 9 and you get 42. So, in order to avoid hydroplaning I need to maintain speed below 42 mph.
Special thanks to Curtis Klotz for teaching me this very useful info. Having hydroplaned once, I never ever want to do that again.
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