seems there is a good reason to avoid driving for the larger trucking corporations, they have a nearly 100% driver turnover annually

By the American Trucking Associations’ count, annual driver turnover runs nearly 100% at so-called large truckload carriers, also known as long-haul truckers. And if it costs $3,000-to-$5,000 to recruit and hire one driver (I’m told that estimate is conservative), keeping the million or so long-haul driver jobs (1) filled every year represents a $3 billion-to-$5 billion toll on an industry that already suffers from narrow profit margins and an enormous need for capital.

http://www.forbes.com/sites/maryjosephs/2016/01/06/100-driver-turnover-hurts-trucking-industry-correct-ma-approach-can-fix-it/