Positive marijuana tests push many drivers out of the industry, aggravating an existing recruiting and retention challenge. Education and messaging can help keep drivers up-to-date on DOT rules—but ...

Although marijuana is still a Schedule I substance and illegal under federal law, many states have legalized its use in recent years. A Pew Research Center analysis found that 54 percent of Americans ...

And because high-potency cannabis is sold for more, tricks to juice the THC testing results favor those willing to use them, in an era when the industry is in contraction. All the while, labs are free ...