because fog is just a regular cloud lower to the ground, right? and if a cloud is just like air dust and water, how do a dozen cars going 80mph (130kph) not just blow it away??
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Why aren’t there just random pockets of no air in your house? Wouldn’t you just blow the air out of the way when you walk down your hallway? Then your kid tries to walk through, and suddenly can’t breath and dies?
No, because the displaced air is immediately followed by other, surrounding air.
This is the same instance with your car and foggy air.
Fog is in the air. Car moves through the foggy air, creating a gap that gets filled by more foggy air QED
When a submarine drives through water, does it blow the water away, or does the water stay all around as the car moves through it?
Yeah some of the water might move with the sub, but other water just takes its place. Same as what happens to normal air when you drive through it, yeah you push some and create some wind, but the stuff taking its spot behind you is more air
There’s no other type of air to rush in and take the fogs place. It’s all fog.
It does dispel the fog slightly from the movement and heat of the vehicles. I don’t have a scientific reference, but as you drive in fog, you can keep the vehicle in front in view for quite a distance because of the gap caused. Beyond that distance, the fog falls back in place and you are blinded. It’s a proven technique to keep the vehicle in front in view. However, they may be driving in blinding fog as the lead car so be ready to brake and maintain an “assured clear distance” ahead.
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