Roadrunner Transportation Systems Inc. reported a fourth-quarter loss of $58.4 million, or $1.52 a share, compared with a loss of $23.3 million, or 61 cents per share in 2017. The Downers Grove, Ill.-based truckload and less-than-truckload carrier continues to struggle financially in the wake of an accounting scandal and the departure of several key executives, and at a time when business conditions in the freight industry remain strong.