The ten most misunderstood road rules in NSW, as compiled by Transport for NSW.

1. Drivers approaching a roundabout must use their indicators when turning or making a U-turn.

2. If a driver is turning left or right at an intersection they must give way to pedestrians.

3. A mobile phone can only be used while driving if it's secured in a mounting or operated by Bluetooth technology or voice activation.

4. When a driver is travelling on a road without lane markings and the number of lanes is reduced, they must merge by giving way to any vehicle that is ahead of them.

5. On roads with a speed limit of more than 80km/h, motorists must not drive in the right-hand lane unless overtaking, turning right or making a U-turn.

6. High beam is not permitted if travelling less than 200 metres behind a car going in the same direction or less than 200 metres from an oncoming vehicle.

7. When making a U-turn a driver must have a clear view of any approaching traffic and give way to all vehicles and pedestrians.

8. Drivers must stay three seconds behind vehicles in front of them.

9. A school zone is the area around a school with a speed limit of 40km/h normally from 8am to 9.30am and between 2.30pm and 4pm on school days.

10. A driver approaching traffic lights showing a yellow traffic light must stop if they can do so safely.

AAP