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pres4654 karma

The semi truck in front of the passenger car acts as a big wind screen and smashes most of the air pressure in front of your smaller car. It is extremely effective (some claim 30-50% improvement in gas mileage). However it is dangerous, and the effectiveness increases/decreases depending on proximity. Basically, it's great for the passenger car but it's nerve-wracking for the truck driver as you're largely out of theit sight directly behind their trailers.

pres4654 karma

Can I just say thank you, and I hope more groups work to fight misinformation about science?