Semi-trucks are some of the longest, biggest, and heaviest vehicles on the roads. Semi-trucks -- and here's what "semi" means on a semi-truck-- are wide, averaging 8.5 feet, and can reach 70 to 80 ...

You pull into a rest stop where a bunch of truckers have parked their semis overnight. You watch with confusion as one of them comes around the back of a rig, metal pole in hand, and starts whacking ...

While semi trucks and their trailers are obviously massive and heavy, it may not be apparent to everyone just how much more bulk these road goliaths possess when compared to other vehicles. Per U.S.