>>25632912
One time I merged into a single lane behind a dump truck full of gravel, I knew it was fucky and kept like x4 the normal distance from him, and his tailgate fell off and gravel poured on the road. Me being cautious around those motherfuckers allowed me to break safely and not fuck up the car.
One time I also had to redline an old diesel van to get away from a chain of trucks with dump trailers full of manure. The smell was terrible even with windows closed and vents shut.
>>25632933
Maybe they they are trying to safe fuel by driving in the air pocket?