The Department of Transportation has issued a compliance notice warning truck drivers and other safety-sensitive transportation workers about the potential mislabeling of hemp-derived products that could contain illegal levels of marijuana that might test positive in a DOT drug test.

Idaho Republican Gov. Brad Little has issued an executive order that will permit motor carriers to transport hemp through the state that in recent months has been a risky proposition for truck drivers.

The Canadian Trucking Alliance will continue to urge government officials, including those recently elected, to establish a drug and alcohol testing program.

SAN DIEGO — The trucking industry needs to get out in front of the challenges it faces with the growing legalization of marijuana, according to the co-chairman of an American Trucking Associations working group studying the impact of controlled substances.

Last month, drug-testing firm Quest Diagnostics scientist Barry Sample had a serious warning for U.S. employers: Be on the lookout for marijuana use by your workers. It’s on the rise.

While states and American Indian tribes currently can regulate the lawful production and sale of hemp produced under a 2014 law, they may not prohibit the interstate transportation or shipment of the product grown under a program authorized by the U.S. Department of Agriculture, according to a new legal opinion issued by USDA’s general counsel.

A decision expected soon by the 9th U.S. Circuit Court of Appeals could send a clear signal to truckers and shippers on the legality of transporting industrial hemp across state lines.

Despite growing concerns in the trucking industry over a rise in the legal use of marijuana, there is a general lack of research on the relationship between use of the drug and crashes, as well as a need for better law-enforcement tools and training to detect impaired-driver use of the drug, according to new research by the American Transportation Research Institute.

The 9th U.S. Circuit Court of Appeals has agreed to hear a legal challenge to the arrest of an Oregon truck driver and seizure of a 6,700-pound load of hemp being transported through Idaho.