[Stay on top of transportation news: Get TTNews in your inbox.] Motor carriers must continue to conduct random drug tests with 50% of their truck drivers and random alcohol tests with 10% of their ...

Nearly half the states now have laws legalizing recreational marijuana, with half of the general population and 41% of truck drivers now living in states where recreational marijuana use is legal.

To achieve reliable and reproducible results, analysts must understand the importance of correct equipment set-up, sample introduction and sampling. In addition to use of dissolution testers, this ...