Interesting things to know about 18-wheelers
When was the last time you drove on a highway or an interstate without passing a semi-truck along the way? With more than 15.5 million big rigs currently operating in the United States, probably never. But, even though you’re constantly sharing the road with semis, do you really know much about them? Take a look at the list below for some interesting facts about 18-wheelers — some of them may surprise you.