Speed

If a driver's brake lights are not functioning, what signal must they use when slowing down?

Question image: If a driver's brake lights are not functioning, what signal must they use when s
  • A Flash hazard lights only
  • B Sound the horn
  • Move the arm up and down out of the window
  • D Flash headlights at oncoming traffic

Why this is the correct answer

When the brake lights are not working, the driver must move their arm up and down out of the window to warn vehicles behind of the speed reduction.

Ready to pass the DGT theory test?

Practise official-format questions in English, with explanations after every answer and full progress tracking.

Try a free practice test