Can I overtake on a double line?
Most of us know (we hope) that a continuous double line means no overtaking, but are there any exceptions to this rule?
Continuous single and double dividing lines mark sections of road where overtaking is hazardous, typically on corners, crests and other areas of restricted visibility.
In South Australia, there are three scenarios where you can legally cross a double line. So, what are they?
1. Overtaking cyclists
You can overtake a cyclist or personal mobility device (PMD) rider (but not any other type of vehicle) when there’s an unbroken single or double dividing line, provided it’s completely safe to do so. Never overtake on a blind corner, before a crest or any other place that restricts your view of oncoming traffic. Overtake smoothly, as the draught from your vehicle can knock cyclists off balance, and ensure you can see the cyclist in your rear-vision mirror before returning to your lane.
Don’t forget, when overtaking a cyclist or PMD rider, you must leave at least one metre of clearance when the speed limit is 60km/h or less and 1.5 metres in zones over 60km/h.
2. Avoiding obstructions
If something is blocking your path, such as a fallen tree, a broken down or illegally parked vehicle, or roadworks, you can cross a double line to avoid the obstruction, provided you have a clear view and can do so safely. A slow-moving vehicle or a vehicle stopped in traffic isn’t considered an obstruction and doesn’t give you permission to cross double lines.
3. When instructed to
You’re legally able to cross a double line if directed to do so by a police officer or an authorised traffic controller. Reasonable directions by police officers or other authorised people override the Australian Road Rules.
Advice for overtaking safely
Crossing unbroken dividing lines is risky and a contributor to fatal and serious-injury crashes, particularly in regional areas when cars are travelling at a high speed. Unless one of the three exceptions applies, always wait for a section of road with a broken line or a designated overtaking lane.
Where crossing is permitted, the onus is on you to do it safely. Be patient and overtake as you would any other vehicle. Wait until you have a clear view of approaching traffic and a large enough gap to overtake safely.
Final note: Disobey the rules for overtaking and you risk a $494 fine, a $108 Victims of Crime Levy and three demerit points.