Large vehicles

Take extra care when driving near large, heavy vehicles.

Examples of LONG VEHICLE and OVERSIZE signs - black text on a yellow background.

Oversize vehicles

Oversize vehicles are becoming more common on the road network because of the growing freight task. Often they are slower moving, occupy more of the road (sometimes more than one lane) and take longer to stop.

If you see a LONG VEHICLE sign, the vehicle ahead is longer than normal vehicles.

If you see an OVERSIZE sign, the vehicle ahead is wider, longer and/or higher than normal vehicles.

Some oversize vehicles may be accompanied by pilot vehicles; these vehicles have yellow flashing lights displaying an ‘Oversize Load Ahead’ warning sign. Pilot vehicles provide other drivers advance warning of an oversize vehicle ahead. In some cases police may accompany pilot vehicles or will escort unusually large oversize vehicles, as well as direct traffic if required supporting safe road travel for all drivers.

When approaching an on-coming oversize vehicle you should:

  • Be careful and reduce speed
  • Keep to the left of the centre line
  • Be prepared to move to the left side of the road if necessary.

You should use extreme care when overtaking an oversize vehicle.

Oversize vehicles may sometimes travel down the centre of a bridge and can occupy more than one lane on the bridge. This may not allow enough room for another vehicle to fit on the bridge at same time. In these cases be prepared to stop and wait for the oversize vehicle to exit the bridge.

Do not attempt to cross a bridge occupied by an oversize vehicle as these vehicles are unable to reverse back.

If you see portable watning triangles placed on the road this can indicate a heavy vehicle has broken down. Slow down and drive carefully when you see triangles on the road.

Large, heavy turning vehicles

Be careful of large, heavy vehicles displaying a DO NOT OVERTAKE TURNING VEHICLE sign as they may use more than one lane when turning left or right.

Example of DO NOT OVERTAKE TURNING VEHICLE signs - black text on yellow background, some versions include a red warning shape.

In a one-way street, a long vehicle may also use two lanes to turn left or right if it displays a DO NOT OVERTAKE TURNING VEHICLE sign.

Diagram showing how a large vehicle may use both lanes to turn left.

When a long vehicle is turning and displays a sign DO NOT OVERTAKE TURNING VEHICLE you must not pass on the right if it is turning right.

A driver may overtake to the left of a vehicle displaying a DO NOT OVERTAKE TURNING VEHICLE sign, only if it is safe to do so.

Diagram showing a car overtaking to the left of a large vehicle when it is safe to do so.

A driver may overtake to the left of a vehicle displaying a DO NOT OVERTAKE TURNING VEHICLE sign, only if it is safe to do so.

You need to be careful of all large, heavy vehicles that are turning. If you put your vehicle in the path of a turning vehicle you may be crushed.

Diagram showing a vehicle in danger of being crushed by driving up the left side of a long vehicle turning left from the right lane.

Light rail vehicles

When a light rail vehicle is coming towards you, keep to the left unless there is a barrier between you and the light rail vehicle.

Only overtake on the left to pass a light rail vehicle travelling in the centre or on the right hand side of the road.

You should overtake on the right when the light rail vehicle is on the left hand side of the road.

You must not overtake a light rail vehicle on the left if it is turning or signalling to turn left. If it is turning or signalling to turn right, you must not overtake it on the right.

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