New South Wales · Driver Knowledge Test (DKT) · Road safety

What does NSW law say about radar detectors and jammers?

The answer

  • It is illegal to have one in your vehicle Correct
  • They are legal outside built-up areas
  • They are legal if not switched on
  • They are legal for vehicles over 4.5 tonnes

Why that's the answer

It is illegal to have a radar detector or jammer in your vehicle at all — that is, anything that detects, interferes with or reduces the effectiveness of speed-measuring devices.

Where this rule comes from

Take the full New South Wales practice test (153 questions)

More NSW DKT questions

Same topic first — road safety trips up more learners than any single rule.

Ready for the road?

Once you pass your Driver Knowledge Test (DKT), you'll need 120 supervised hours in New South Wales. Find an instructor with transparent pricing and live availability.

Find a driving instructor near you