05/05/2026
Roadside Drug Testing in Australia – State by State
*** New South Wales (NSW)
Tested for: THC, M**A, co***ne
Law: Random Drug Testing (RDT)
Step-by-step:
1. You are stopped at a roadside testing site or random intercept.
2. Officer asks for licence.
3. You’re directed to provide a saliva sample (oral swab).
4. The swab is analysed roadside (few minutes wait).
5. If negative → you’re free to go.
6. If positive → you’re taken to a secondary test (another saliva sample).
7. If the second test is positive → you receive a notice and a lab confirmation test is sent away.
8. If lab confirms → court attendance notice.
Important: NSW has zero-tolerance presence laws for THC (not impairment-based).
*** Queensland (QLD)
Tested for: THC, M**A, co***ne
Step-by-step:
1. Random stop or testing station.
2. Licence check.
3. Oral saliva swab.
4. If first test positive → second roadside test.
5. If confirmed → further saliva sample sent to lab.
6. You may receive immediate licence suspension (in some circumstances).
7. Court summons if confirmed.
QLD also uses presence-based laws, not impairment.
*** Victoria (VIC)
Tested for: THC, M**A, co***ne
Step-by-step:
1. Stopped at a booze bus or mobile site.
2. Licence check.
3. Saliva test.
4. If positive → second roadside test.
5. Confirmed → oral fluid sample sent to lab.
6. Immediate licence suspension possible.
7. Mandatory court appearance if confirmed.
Victoria is also zero-tolerance for presence.
*** Western Australia (WA)
Tested for: THC, M**A, methamphetamine (amphetamine-type)
Step-by-step:
1. Random stop or checkpoint.
2. Licence requested.
3. Saliva test.
4. If positive → second test.
5. Confirmed → lab testing.
6. Court notice issued.
WA also has impairment offences separate from presence offences.
*** South Australia (SA)
Tested for: THC, M**A, methamphetamine
Step-by-step:
1. Random stop or drug bus.
2. Licence check.
3. Oral fluid sample.
4. Positive → confirmatory sample.
5. Lab confirmation.
6. Court summons.
SA operates under presence-based testing.
*** Tasmania(TAS)
Tested for: THC, M**A, methamphetamine
Procedure mirrors mainland states:
• Initial swab
• Second confirmatory swab
• Lab test
• Court if confirmed
Australian Capital Territory (ACT)
ACT follows similar procedures to NSW (it uses NSW policing infrastructure).
Presence-based detection applies.
*** Northern Territory (NT)
Tested for: THC, M**A, methamphetamine
Process:
• Licence check
• Saliva swab
• Confirmatory swab
• Lab testing
• Court if confirmed
Key Things Australians Should Know
• It is illegal to refuse a roadside drug test.
• Most states operate under presence laws, not impairment laws.
• THC can be detected after impairment has passed.
• Medical cannabis does NOT exempt you in most states (except limited protections in Tasmania under specific conditions).
• Penalties usually include fines, licence disqualification, and court appearance.
*** Big Picture
Australia’s system focuses on detection, not impairment, which is why this topic generates debate — particularly around fairness, medical cannabis patients, and residual THC detection.
