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Being clear about road rules and how to apply them will help you stay a safe and confident driver. This is a refresher on the rules around intersections, roundabouts, and merging.

 

Intersections

In all of the following diagrams, the car with the dotted arrow path must give way.

A blue car is indicating right at a 4-way intersection controlled by give way signs. An oncoming red car is indicating left. Neither have give way signs. The blue car must give way to the red car.

If you’re turning right, give way to all vehicles coming towards you who’re turning left.

Two cars on opposite sides of the intersection behind stop signs. The blue car at the bottom of the intersection is turning right. The red car at the top of the intersection is turning left. The blue car must give way to the red car.

This also applies when both vehicles are facing the same control, such as stop and give way signs and green traffic signals.

A blue car is indicating left to turn onto the continuing road of a T intersection. A red car is approaching from the right in the lane the blue car wants to enter. The blue car must give way to the red car.

If you’re on a terminating road (bottom of the T), give way to traffic on the continuing road (top of the T).

A blue car is indicating left to turn onto the continuing road from a drive way. A bicycle is approaching from the left and wants to turn into the driveway. The blue car must give way to the cyclist.

This includes people on bikes and e-scooters. Driveways are a form of T-intersection so the same rules apply.

Roundabouts

Single lane
A blue car is approaching a single-laned roundabout with four exits, each with give way signs. To the right of the blue car, a red car is approaching the roundabout. Neither car is indicating. The blue car must give way to the red car.

Give way to all road users that will cross your path from your right as you enter the roundabout.

Multi-lane
A blue car is approaching a multi-laned roundabout with four exits. On the blue car's right, a red car is approaching the roundabout to go straight through. The blue car is indicating left. The blue car must give way to the red car.

Be in the correct lane for where you want to go. Give way to all vehicles that will cross your path from your right as you enter the roundabout.

Indicating at a roundabout

A blue car is approaching a single-laned roundabout with four exits, each with give way signs. The blue car is indicating to turn left.

If you’re turning left at the first exit of a roundabout, indicate left as you come up to the roundabout.

A blue car and a red car are approaching a multi-laned roundabout with four exits. Two black arrows show the cars don't indicate until they are past the exit before the exit they are taking, then they signal left. The cars stay in the same lane.

If you’re going straight through a roundabout don’t indicate as you come up to the roundabout – indicate left as you pass the exit before the one you wish to take.

A blue car is approaching a multi-laned roundabout with four exits, each with give way signs. A black arrow shows the the blue car signals right until it is past the exit before the exit it is taking, then it signals left. The blue stays in the same lane

If you’re travelling more than halfway around a roundabout, indicate right as you come up to the roundabout. indicate left as you pass the exit before the one you wish to take.

Did you know?

People on bikes don’t have to indicate
all the way around a roundabout. This
is because it’s not safe to keep up their
signal arm when turning.

Keep an eye out for people on bikes
and give them plenty of space.

Using lanes correctly

When turning right from a one-way street or multi-laned road, you should stay in the same lane throughout the turn.

A blue car and a red car are waiting to turn right from a one-way street. The blue car in the left lane must stay in the left lane through the intersection. The red car in the right lane must stay in the right lane through the intersection.

Turning right from a one-way street

A blue car and a red car are waiting to turn right from a one-way street. The blue car in the left lane must stay in the left lane through the intersection. The red car in the right lane must stay in the right lane through the intersection.

Turning right from a multi-laned street

The blue car is in the left lane and turning left. They must turn left into the left hand lane of the new road. On the opposite road the red car is in the right lane and turning right. They must turn right into the right-hand lane.

Two vehicles turning onto the same road – both vehicles stay in their own lane throughout the turn.

At an intersection, a red car and a blue car are travelling in the right lane, a green car is not far behind in the left lane. The blue car decides to change lanes suddenly, cutting off the green car. A red X shows this is not the right thing to do.

Try to get into the correct lane before you get to the intersection. However, if you must change lanes, make sure it’s safe before you start. Never change lanes suddenly.

Turning on or off a road with a flush median

A flush median is a strip in the centre of the road that's marked with white diagonal lines within parallel lines. It's a place for vehicles to wait safely before turning right off the road, or after turning right onto the road.

You can only drive onto the flush median to:

  • wait to move into a gap in the traffic flow after you've turned right - car A in the diagram
  • slow down and wait before turning right - car B in the diagram.
A 4 laned road with the centre of the road marked a flush median. Car A, the blue car, has turned from a side street onto the flush median to wait for a gap in the traffic. Car B, the red car is waiting on the flush median to turn into a side road.

When using a flush median, watch out for pedestrians who might be waiting on the flush median to cross the road.

Merging

A car waiting at an intersection has an gap on one side of the road. There is a merge space in the middle of the road so the car can move across the road to the merge space to wait for a gap on the other side of the road.

Merge lanes help turning vehicles join the traffic flow. If you're in a merge lane, indicate for at least 3 seconds, move into a safe gap and adjust your speed and following distance.

Two lanes are merging into one lane. As the vehicles merge each takes a turn entering the single lane.

The best way to merge is like a zip – where a vehicle from the left lane goes and then a vehicle from the right lane goes, and so on. As you merge, let one vehicle from the other lane go first, and then go.

A blue car is entering the motorway. A red car is in the far right lane. Black arrows show the blue car should stay in the centre of the lane to enter. Another black arrow with a red X shows the car shouldn't enter from the on-ramp's right side.

When using an on-ramp to enter a motorway:

  • Use the whole length of the on-ramp to match the speed of the motorway traffic.
  • Signal right for at least 3 seconds.
  • Move into a safe gap in the traffic.
  • Don’t enter the motorway at a sharp angle.
  • Adjust your speed and following distance.
A blue car is using the off-ramp to exit the motorway. Black arrows show the car should stay in the centre of the lane and indicate left. Another black arrow with a red X shows the car should not swerve suddenly if it goes too far past the exit.

When using an off-ramp to leave a motorway:

  • Watch for exit signs.
  • Signal left for at least 3 seconds.
  • Move into the left-hand lane as soon as possible.
  • Keep up with the traffic flow until you're on the off-ramp.
  • Don’t leave the motorway at a sharp angle.
  • Adjust your speed.

Sharing the road

A red car is blocking a cycle-only lane on a multi-laned road. There's a red cross over the red car to show they shouldn't do this.

Cycle-only lanes are marked by a symbol of a cycle on the road. You must not stop in or block a cycle lane. When coming up to an intersection you must not enter a cycle lane if stationary traffic is in the way and you’ll block the cycle lane.

A cyclist is waiting in an advanced stop box at a controlled intersection. A blue car waits behind them, outside of the green box.

An advanced stop box is a green square with a white cycle symbol at the top of a controlled intersection. It’s only for cyclists and gives them a head start when the lights turn green. You shouldn't go onto the green cycle box. You should expect cyclists to come through to the front of the queue.

Road code

You can also review these, and other road rules you want to refresh yourself on, in the road code. You can read the road code on our website, or get a printed road code from most bookstores or your local library.  

Road code