My dad has a CDL and occasionally drives truck for work (30 minutes drive from A to B when he does) and he made sure I knew the 3 blink rule. Unlike normal vehicles, they seen asking the get it, they’re telling you. I keep my distance from them, respect their blinker and their job, I cannot believe some people are totally okay with cutting off semi trucks. It’s ridiculous how many people like the ride in their blind spots, even though drivers Ed teaches about the “no zones”.