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A report sent to Congress earlier this summer said that the reason for a nearly three-year delay in developing a proposed hair drug-testing rule was caused by such “unresolved scientific issues” as hair color and potential external contamination of hair that could adversely affect drug test outcomes.

Hyundai Motor Co. and Cummins Inc. said in a joint statement that they have agreed to evaluate opportunities to develop and commercialize electric and fuel cell powertrains.

UPS Inc. won U.S. certification to fly drones under regulations similar to those for airlines, a milestone that allows the company to vastly expand airborne deliveries.

LISLE, Ill. — Service sells trucks, and better service sells more trucks, Navistar executives said during the company’s first investor day since 2015. The original equipment manufacturer is looking to expand its brick-and-mortar footprint as well as online presence to help accomplish this.

The absence of autonomous vehicles legislation before congressional committees has not discouraged industry stakeholders from continuing to insist lawmakers establish a set of federal policies for the technology.

Digital freight broker Convoy launched Convoy Connect, a free transportation management system available nationwide that comes preconfigured with access to Convoy’s carrier network.

Automation has “contributed substantially” to reducing the portion of national income that goes to U.S. workers over the past two decades, according to a new study by economists at the Federal Reserve Bank of San Francisco.

Transportation Secretary Elaine Chao will be among the headline speakers at the annual conference of the American Association of State Highway and Transportation Officials.