When you tap “Buy Now” and a package magically appears two days later, thank the people piloting 18-wheelers across the continent. Trucks haul roughly 73 percent of all U.S. freight by weight – they’re the literal backbone of your next-day delivery habit.  But wrangling 40 tons of steel for a living takes a lot more than liking long drives. The best drivers juggle eight core skills that keep the wheels moving and the freight (plus everyone else on the road) safe. Quick reality check: if every truck in North America parked for 24......