YRC Worldwide Inc. and Universal Logistics Holdings Inc. reported weaker third-quarter profits in a continuation of the freight industry trend that has led to lower earnings at most companies.

Two truckload carriers suffered significant declines in profits for the third quarter as compared to one year ago as the sector struggles to turn around a tepid market.

Norfolk Southern Corp. became the only U.S. railroad to report higher third quarter earnings, improving net income 2% to $460 million, or $1.55 per share, as cost reductions of 10% outpaced a decline in revenue.

Trailer manufacturer Wabash National Corp. reported year-over-year net income rose and revenue fell in the third quarter.

The third-quarter earnings season began with truckload carriers struggling to match year-over-year results, headlined by Covenant Transportation Group’s profits plummeting 62%.

Volvo Group reported third-quarter earnings and sales fell amid excessive Class 8 inventory in North America as orders and sales both dropped by more than 30%, compared with a very strong market in 2015.

Landstar System Inc. reported third-quarter net income fell 7.8% to $36.3 million, or 86 cents per share, hurt by a drop in flatbed freight loads and revenue

Kuehne + Nagel Inc. reported third-quarter earnings before interest, taxes, depreciation and amortization fell 3.6% to $273 million, counter to analysts’ average estimate of a 6.4% increase to $267 million.

Railroads lost cargo to trucks in the third quarter, adding to a yearlong slide in profits as demand tumbled for coal, oil and metals.