Have you ever looked closely at those massive trucks on the highway carrying heavy loads? They’re made up of two main parts: the semi-truck and the semi-trailer. Together, they form the full rig you see hauling goods across the country. Truckers sometimes drive the semi-truck without the trailer — a practice known as ‘bobtailing.’  However, it’s not the safest thing to do, mainly because the trailer adds the weight and balance that makes the truck more stable on the
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