Roundabout accidents
Short answer
Who is at fault in a roundabout accident?
Drivers entering a roundabout are generally required to give way to vehicles already on it, so an entering driver often carries responsibility. Multi-lane roundabouts produce a second common dispute: a vehicle exiting across another lane. Note which entry each vehicle used, which lane each was in, and where the impact landed.
Entering the roundabout
The give-way rule on entry is the most common source of roundabout collisions. Australian road rules on roundabouts are set by each state and territory — check your state hub for the applicable rules.
Multi-lane roundabouts
The second common collision happens inside the roundabout, when a vehicle in the inner lane exits across a vehicle in the outer lane. Lane choice on entry, road markings and signage all matter, and they vary by roundabout.
- Photograph the approach and its lane arrows and signage.
- Photograph the roundabout markings themselves.
- Note which entry each vehicle came from and which exit each was taking.
- Note which lane each vehicle was in on entry and at impact.
- Note indicators — including whether either driver indicated before exiting.
Why roundabout disputes are messy
Both drivers are moving, both are turning, and both have a genuinely partial view. Honest accounts frequently conflict. Photographs of the physical layout, taken from each approach, are unusually valuable here because they let an assessor reconstruct the geometry.
Common questions
Do I have to indicate on a roundabout?
Indicating requirements on roundabouts are set by road rules in each state and territory, and generally include signalling when exiting where practicable. Check the rules for the state where the accident happened.
The other driver was in the wrong lane. Does that decide it?
It is relevant but not automatically decisive. Insurers weigh lane position with the give-way obligations, the markings and the point of impact.
Sources
Crash Guide checks state rules against primary government and regulator sources. If something below has changed, tell us and we will correct it.
- Australian Financial Complaints Authority — AFCAChecked 10 September 2026
- General Insurance Code of Practice — Insurance Council of AustraliaChecked 10 September 2026