
In October 2010, the U.S. Department of Transportation (DOT) created stricter drug testing rules for employees of federally regulated employers that include lower cutoff levels for substances like amphetamines and cocaine. At the same time, the DOT added substances like ecstasy and heroin to the required drug testing list for transportation workers in public and private sectors.
As a result of these changes, individuals who had previously met the guidelines to pass a drug test while having consumed banned substances are now more likely to be identified. While the new rules have helped identify more individuals who abuse drugs, there are further steps that employers can take to detect drug use and enhance safety.
Positive Drug Tests on the Rise
While many transportation employees test negative for banned substances, a growing trend of positive test results continues. According to the 2011 Quest Diagnostics Drug Testing Index, there was a 33 percent increase in employees who tested positive for cocaine use since 2010, and a nearly 26 percent increase in employees who tested positive for amphetamines.
According to a March 2012 WebMD report, some transportation workers use illegal substances such as stimulants to help them stay awake and alert. However, some workers use prescribed amphetamines (like methylphenidate) for conditions such as attention deficit hyperactivity disorder (ADHD).
However, researchers have noted that the increase in positives is likely attributed to the lowered cutoff levels that took effect in 2010.
Drug Testing Gaps Remain
As transportation employers know, safety is paramount, and employing drivers that do not abuse drugs is essential. Regulated employers that adhere to federal drug testing guidelines are taking steps to maintain a certain level of safety, but a drug testing gap may still exist. Different drug testing methods provide










