A recent study raises questions regarding the reliability of roadside drug testing devices to test for cannabis.
A study published in the Drug Testing and Analysis journal investigates the two most commonly used devices for roadside testing.
Tomas Arkell, a PhD Student at the University of Sydney was involved with the study which tested two of the most commonly used devices by police.
“What we found was that these test results often came back positive when they should have been negative, or conversely that they came back negative when they should have actually been positive," Mr Arkell said.