The Road Rules require that you must not overtake a vehicle unless you have a clear view of oncoming traffic, and it is safe to overtake.
A driver must not overtake, or do a U-turn across a single continuous centre line, or a single continuous line to the left of a broken line. A driver may only cross the above line markings to enter or leave the road (for example turning into a side street or driveway), or to avoid an obstruction, provided the driver has a clear view of approaching traffic, it is necessary, reasonable and safe to do so.
When overtaking, you must pass the other vehicle at a sufficient distance to avoid a collision or obstructing the path of the vehicle being overtaken. You must not return to your lane until you are a sufficient distance past the overtaken vehicle to avoid a collision or obstructing its path.
When being overtaken by another vehicle on a two-way road, you must not increase your speed until the overtaking vehicle has passed you, has returned to the correct side of the road and is of a sufficient distance in front of you as to avoid a collision.
You must not overtake a vehicle on the left, unless you are on a multi-lane road and the vehicle can be safely overtaken in a marked lane, or the vehicle you wish to overtake is turning right or making a u-turn from the centre of the road and is giving a right change of direction signal.
Similarly, you must not overtake to the right of a vehicle if the vehicle is turning right or making a u-turn from the centre of the road and is giving a right change of direction signal.
Bicycle riders are allowed to overtake to the left of a vehicle, unless that vehicle is turning left and indicating.
For the rules on when you can and can’t overtake across dividing lines, see the section dividing lines.
For more information see the Victorian Road Safety Road Rules rules 140 to 145.