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 ...

Even though we see them almost every day on the roads and highways, it's easy to still be overwhelmed by the gargantuan size of a semi-truck. It may seem odd to consider a machine as massive as a ...