If you've driven on Western Australia's roads, you've likely seen the familiar sign: "Keep left unless overtaking." But what does this mean in practice, and when does it apply? Here's a comprehensive, fact-based guide to help WA drivers stay on the right side of the law.
Dylan Anderson
Keeping Left: The Basics on single-lane roads in WA, drivers must keep as far left as practicable, except for motorcyclists. However, on multi-lane roads, the rule becomes more specific depending on speed limits and signage.
When Must You Keep Left?
If you're driving on a multi-lane road in Western Australia where the speed limit is 90km/h or more, you must stay in the left lane unless:
- You’re overtaking another vehicle
- You're turning right or making a U-turn
- The left lane is a special purpose lane (e.g. bus or bicycle lane)
- The left lane is a turning lane and you're going straight
- You're avoiding an obstruction
- Other lanes are congested with traffic
- Signage requires certain vehicles (e.g. trucks) to drive in specific lanes
Even when the speed limit is below 90km/h, if there is a sign that says "Keep Left Unless Overtaking," then the rule applies regardless of the speed limit.
Penalties in WA
Failure to follow the keep left rule in WA results in a $50 fine and 2 demerit points. This is comparatively low compared to other Australian states but still enforceable and important for maintaining road safety.
Dylan Anderson
Why the Rule Exists
The purpose of the keep left rule is to improve traffic flow and reduce congestion, especially on high-speed roads and highways. Keeping slower traffic to the left allows faster-moving vehicles to overtake safely and efficiently.
How It Differs Across States
Here's how Western Australia compares to the rest of the country:
| State/Territory | Rule Summary | Fine | Demerit Points |
|---|---|---|---|
| WA | Keep left if speed limit is 90km/h+ or signed | $50 | 2 |
| NSW | Keep left if speed limit is over 80km/h | $349 | 2 |
| QLD | Keep left if speed limit is over 90km/h | $123 | 2 |
| VIC | Keep left if speed limit is over 80km/h | Varies | 2 |
| SA | Keep left unless overtaking on multi-lane roads | $355 | 2 |
| TAS | Keep left unless overtaking on high-speed roads | $146.25 | 2 |
| NT | Keep left on multi-lane roads 80km/h+ | Not specified | Not specified |
| ACT | Strictly enforced on high-speed roads | $316 | 2 |
Key Takeaways for WA Drivers
- Always keep left on roads with a speed limit of 90km/h or more
- Obey any posted "Keep Left Unless Overtaking" signs
- Avoid fines and demerit points by using the right lane only when necessary
Understanding and adhering to this rule not only helps you avoid penalties but also keeps traffic flowing more smoothly for everyone.
Disclaimer: This article is for informational purposes only. For the most accurate and up-to-date information, please consult the Western Australia Department of Transport or Road Safety Commission.
Dylan Anderson
Dylan Anderson
