A semi-truck without a trailer attached is always a rare, interesting sight. The semi looks a bit lost and naked, in need of something to haul, so its purpose is complete. There’s actually a name for that barren semi-truck: a bobtail truck, and when it’s in the act of driving like this, it’s called bobtailing. That’s essentially the difference between a bobtail truck and a box truck: the box truck has the box, or trailer, in tow and the
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