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

What is the suggested minimum height for a child to use an adult lap-sash seatbelt?

The answer

  • 135cm or taller
  • 145cm or taller Correct
  • 155cm or taller
  • 125cm or taller

Why that's the answer

The suggested minimum height for using an adult seatbelt is 145cm. Children aged 7 to 16 who are too small for a seatbelt should use an approved booster seat, forward-facing child car seat or anchored safety harness.

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.

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