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AIBU?

Share your dilemmas and get honest opinions from other Mumsnetters.

Car crash on roundabout - who’s at fault?

169 replies

WeGoAgainIVF · 13/11/2025 10:32

Hi, I’m wondering if anyone would mind letting me know what they think about this situation and who’s at fault.
I had a car accident last week and I’m stressing out waiting for the insurance companies to settle the claim. I know this can go on for weeks so I would be grateful for any input as to how it might go!
To be unbiased I’m not going to say which car I was driving.

Car X enters roundabout in right hand lane to go straight on (on this particular roundabout you are able to go straight on in both lanes).

The traffic in the left hand lane was queuing to get on the roundabout but had left a space for traffic approaching the roundabout from the left to enter.

Car Y entered the roundabout between the cars in the left hand lane, while Car X was already in the right hand lane, speed unknown but at a guess 30mph, maybe a bit more. Car Y collided with Car X.

Car X didn’t know exactly how fast they were going. Car Y said they had been on a long journey, it was dark and Car X was black.

Who is at fault?

OP posts:
BaalSatanas · 13/11/2025 14:11

Quite simply it depends on who has right of way. Clearly a car already on the roundabout has right of way.

In the UK the person on the right (Car X) has the right of way, the person on the left (Car Y) has to give way to the person on the right (Car X).

Schoolchoicesucks · 13/11/2025 14:15

If entered the roundabout in car X from the right lane and she entered it from the left, how did she crash into you? Did she move into the right lane once on the roundabout? Or were you moving left to exit in the left lane?

MoveOnTheCards · 13/11/2025 14:33

Y’s fault, but I can’t work out why their front passenger bumper hit your back passenger side. I get her car hitting your passenger side, just not her passenger side of the car?

Freysimo · 13/11/2025 14:39

Similar thing happened to me years ago. I was car X already on roundabout. Other driver's insurance tried for 50/50 fault but luckily I had legal insurance and stood firm. They backed down eventually.

GAJLY · 13/11/2025 15:00

Car Y is wrong.

BringBackCatsEyes · 13/11/2025 15:08

Im worrying that they will get camera footage from the roundabout and say I was going too fast and say it was my fault. Do insurance companies normally get this footage? I’ve never heard of them doing that before.

I was asked by my insurance company to provide any CCTV footage of an accident I was involved in. The roundabout is very near to a petrol station, so I asked them and they sent me the clip which I forwarded.
A pretty miserable little movie tbh!

Karatema · 13/11/2025 15:14

There’s no such thing as 50/50 any more although insurers can agree both their clients were at fault!
This is why I have a forward and reverse facing camera and why I nag my DH to instal one!
Cameras are a huge help in this situation especially as there are scammers out there!

TallulahBetty · 13/11/2025 15:26

Coconutter24 · 13/11/2025 13:17

I had a car accident about a year ago now. This was on a small roundabout. I was taking the second exit and as I was travelling around the roundabout, the other driver entered the roundabout and pulled in front of me causing me to drive into her rear driver side. I was coming from their right side.

If this is you on another post with the same accident then I think from a legal point it’s 50/50. Yes car y caused the accident but you went into the rear or them

No. I went into someone when they pulled out on me - 100% within the speed limit - they were found at fault.

watchingplanesicantafford · 13/11/2025 15:27

How did their passenger side hit your passenger side if you were both going in the same direction?

sandyhappypeople · 13/11/2025 15:58

watchingplanesicantafford · 13/11/2025 15:27

How did their passenger side hit your passenger side if you were both going in the same direction?

I get the impression car Y was squeezing through the gap in the stationery traffic, and may have ended up pointing towards oncoming traffic slightly (to swing around the back of the car they were trying to get around) if she poked out into car X lane, her passenger side bumper would have been the first thing that came in to contact with OP (car X), risky manoeuvre if you can't see what's coming!

I can't see a scenario where car x is to blame, they entered the r/a in the correct lane, stayed in that lane and were going to exit in that lane,, until some pillock drove into the side of them.

Car Y is the one trying to change lanes and failing to give way.

Coconutter24 · 13/11/2025 16:00

TallulahBetty · 13/11/2025 15:26

No. I went into someone when they pulled out on me - 100% within the speed limit - they were found at fault.

Which is as it should be but that’s not always the case

WeGoAgainIVF · 13/11/2025 16:02

GrumpyMenopausalWombWielder · 13/11/2025 13:26

I’m going to go against the majority and say I think car X is more at fault. It does depend on the size/layout/intended entry/exit etc. but my reading is, Y was able to enter the r/a into the left hand lane (where car Y was not travelling g) and was therefore also established. In order to exit the r/a, X had to cross the left hand lane to exit. You still have to check you can proceed when crossing lanes, even on a r/a. I’d need to see a Google map, both drivers’ statements, where the point of collision was & area of damage to both vehicles before making a final call on fault. But the chances are, a 50/50 split is probably more likely.

I agree that anyone entering the r/a has to give way to traffic from the right, but you can enter a r/a if traffic in the lane your entering into gives way to you i.e. leaves a gap & allows you to enter. Once you’re established on the r/a via that option, you’re as established as whoever is in the outer lane. And then the onus switches to whether you can proceed or if another car is changing lanes. And if the other car is cutting across your lane to exit, the onus switches to them ensuring it’s safe to change lanes.

Thats my take - the total opposite of the majority answers!

I wasn’t cutting into the left lane. I entered the roundabout in the right lane and stayed there, with the intention of exiting in the right lane. This particular roundabout you can exit in both lanes in the direction I was going

OP posts:
user2848502016 · 13/11/2025 16:11

Car Y is at fault because you always give way to traffic coming from your right on a roundabout so car Y should have stopped, and also the person who collided with an already moving car will almost always be found at fault in an insurance claim - so as car X was already moving it was car Y’s responsibility to check their path was clear.

WeGoAgainIVF · 13/11/2025 16:12

frasersmummy · 13/11/2025 13:38

Both lanes were straight on but the left hand lane was queueing tells me there was something blocking the exit ahead. Sounds like car y was probably going to go around the roundabout to the right and given there was a queue to exit straight ahead he didnt expect you to be overtaking the queueing traffic at speed in the right hand lane.

I am not sure why if as you say both lanes are marked straight ahead that there was only a queue in one.
Although car y should have given way I think you will find the insurance company may settle 50/50

There was only a queue in 1 lane because nearly everyday on that same roundabout drivers don’t use both lanes, causing the traffic to be at a standstill whilst on the roundabout, hence me actually making use of the other lane instead of allowing a long queue of cars in just the left lane

OP posts:
WeGoAgainIVF · 13/11/2025 16:15

watchingplanesicantafford · 13/11/2025 15:27

How did their passenger side hit your passenger side if you were both going in the same direction?

I was well established on the roundabout when Car Y drove through a gap in the traffic in the left lane, causing her passenger bumper to hit my back passenger door

OP posts:
LaserPumpkin · 13/11/2025 16:16

So the other car was trying to get into or cross the lane that you were already established in?

WeGoAgainIVF · 13/11/2025 16:18

MoveOnTheCards · 13/11/2025 14:33

Y’s fault, but I can’t work out why their front passenger bumper hit your back passenger side. I get her car hitting your passenger side, just not her passenger side of the car?

Because I was already on the roundabout, she’s entered onto my lane from the left to go either straight on or 3rd exit.

OP posts:
Brefugee · 13/11/2025 16:23

Bottom line: get a front and rear dashcam

TableLegs001 · 13/11/2025 16:31

It seems car Y is at fault. If car X was
over the speed limit this is another factor to take into account, I’m not sure how this may be proven or if anyone will be able to (were there witnesses?). Always best to take it carefully on the roundabouts (I have a personal dislike of them), but I can’t see how car X is at fault.

How frightening to have been involved in this, OP. I hope car X and car y occupants are ok physically and probably all shaken up. Hopefully it gets resolved soon.

KarmenPQZ · 13/11/2025 16:32

If there was a row of stationary or near stationary traffic on a roundabout that I was going the same exit as there’s no way I’d be driving around 30mph in an outer lane. Seems very unsafe.

but the fact that their passenger side hit yours tells me they were also slightly pointing in the wrong direction so also doing something unsafe.

Didshejustsaythatoutloud · 13/11/2025 16:45

Was the road in which you were going to exit 1 lane or 2?

MoveOnTheCards · 13/11/2025 17:04

WeGoAgainIVF · 13/11/2025 16:18

Because I was already on the roundabout, she’s entered onto my lane from the left to go either straight on or 3rd exit.

But she would have to have been driving in the opposite direction to you (or as good as) for her passenger side to hit yours, especially if she was coming in from the left.

StepAwayFromGoogling · 13/11/2025 17:07

MoveOnTheCards · 13/11/2025 17:04

But she would have to have been driving in the opposite direction to you (or as good as) for her passenger side to hit yours, especially if she was coming in from the left.

What I was going to say. It makes no sense.

ThereWillBeSun · 13/11/2025 17:08

My question is, who had a dashcam?

Lovemycat2023 · 13/11/2025 17:11

That is one of the worst excuses I’ve heard!