Driver turnover rose measurably during the second quarter for the first time in nearly four years, according to the American Trucking Associations.
The last time turnover increased was in the third quarter of 2006.

With increasing freight volumes and tightening capacity giving drivers more options, turnover at large truckload carriers (those with annual revenue of more than $30 million) climbed from the record low 39 percent in the first quarter to 49 percent in the second quarter.

That's still far below the large fleet peak of 136 percent reached in 2004 and 2005.

Turnover at small truckload fleets experienced a similar jump, rising from 35 percent in the first quarter to 46 percent in the second quarter.

Driver churn at less-than-truckload fleets increased by 50 percent.