This article originally appeared in Newsroom.
The Government recently announced the rollout of roadside drug testing for four specific illicit substances: THC (cannabis), MDMA (ecstasy), methylamphetamine, and cocaine. While presented as a "no-brainer" for road safety, the specifics of the scheme raise significant questions about the science and the political agenda behind it.
The Problem with Detection vs. Impairment
The fundamental issue with this regime is that it tests for the presence of a drug, not the impairment of the driver. For example:
- Cannabis: THC can be detected in frequent users for over 72 hours, long after any impairing effects have worn off.
- Cocaine: Detectable for 12 hours, despite its effects lasting barely an hour.
Inconsistent Logic
If the goal is truly road safety, why does the roadside test ignore the 21 other drugs identified by independent panels as high-risk, including various opioids and sedatives? Why is driving "impaired" permissible if caused by a legally prescribed drug, but not an illicit one?
Ultimately, this feels less like a evidence-based safety measure and more like a puritanical attempt at policing drug use under the guise of transport policy.
"Surely road safety is about impairment, regardless of what drugs a driver is using."