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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.

DALLAS — Infrastructure required for autonomous and electric vehicles will follow demand for such products, according to technology experts.

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.

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.

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

In an 82-15 vote, the Senate cleared legislation for President Donald Trump’s signature to avert a shutdown of federal agencies.

The Federal Highway Administration has issued a final rule that it said will provide greater flexibility for states to use proprietary or patented materials in federal-aid highway projects.

WASHINGTON — The transportation committee in the U.S. House of Representatives is likely to consider a long-awaited highway bill early next year, Rep. Peter DeFazio, the chamber’s top transportation policymaker, said in an exclusive interview with Transport Topics.

Democratic Gov. Gavin Newsom has signed into law a bill that directs the California Air Resources Board and other state agencies to develop and implement a new smog inspection program for heavy-duty diesel on-road trucks.

Significant upgrades of freight and commuter corridors would vastly improve motorists’ quality of life and regional commerce, a panel of infrastructure experts told a congressional panel Sept. 25.