Drug testing limits police don’t want drivers to know under scrutiny

New South Wales Police have faced scrutiny over the closely guarded limits governing roadside drug testing for cannabis. The exact concentration of the drug in a driver's saliva required to trigger a positive roadside test has long been kept confidential by law enforcement.

This lack of transparency regarding the precise detection thresholds has raised questions among drivers and analysts alike. The secrecy surrounding the cut-off limits places the testing protocols under public and professional review.