Scam alerts: we’ve seen an increase in scam texts and emails claiming to be from us, asking for payments.
Check our example scams or report a scam to us

NZTA App: our mobile app provides a simple and secure way to access your driver licence and vehicle information.
Learn more and download the NZTA app

Back to Resources

Research Report 664 Risks of driving when affected by cannabis, MDMA (ecstasy) and methamphetamine and the deterrence of such behaviour: a literature review

Published: | Category: Healthy and safe people , Research programme , Research & reports | Audience: General

This literature review research report on the risks of driving under the influence of drugs and on enforcement of drug driving laws was carried out to inform policy development, including cost-benefit analysis of potential changes to roadside enforcement approaches.

The report confirms that cannabis and other drugs lead to more dangerous driving, particularly in combination with alcohol. It shows, however, that there is no clear relationship between the level of drugs consumed and the degree of risky driving.

Also, although the principles on which deterrence efforts should be based are clear, the relative deterrent effects of various types of enforcement on drug use among drivers have not been clearly established.

Keywords: ambulance, crash, emergency, impact, post-crash, rescue, road,     

Publication details

  • Author:
  • Published: May 2020
  • Reference: 664
  • ISBN/ISSN: 978-1-98-856168-4 (online)