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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:
IridiumSky · 13/11/2025 18:14

OP: You’re obviously car X 🙄

If the description is accurate, car Y is at fault.

Croakymccroakyvoice · 13/11/2025 18:15

Speed isn't relevant for liability but it's something for you to reflect on, that you could have been more prepared for the risk of this happening. In this case you were clearly proceeding in the correct lane and she drove into you so I'd say it should fall in your favour.

The entire thing could have been prevented if people would use both lanes and merge in turn though!

MrsBennetsPoorNervesAreBack · 13/11/2025 18:15

IridiumSky · 13/11/2025 18:14

OP: You’re obviously car X 🙄

If the description is accurate, car Y is at fault.

Well, yes, it is obvious, given that the OP confirmed this several hours ago!!

Madformaltesers · 13/11/2025 18:16

Y

IridiumSky · 13/11/2025 18:18

MrsBennetsPoorNervesAreBack · 13/11/2025 18:15

Well, yes, it is obvious, given that the OP confirmed this several hours ago!!

Oh right, OK.

I couldn’t be bothered to read more than the first page as it’s so obvious.

Crazydoglady1980 · 13/11/2025 18:26

WeGoAgainIVF · 13/11/2025 16:02

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

But you did because you have to cross the left lane to exit. I suspect the insurance company will end up stating 50/50.
When crossing any lane it is your responsibility to check that lane is clear, which it wasn’t. It is also the other car’s responsibility to check that it is clear to enter the roundabout

firstofallimadelight · 13/11/2025 18:27

I agree car y but often insurance companies will settle on a percentage basis of blame (except a rear collision) I was once hit by a car leaving a junction who hadn’t seen me behind the car turning left in front of me. It was their fault as they shouldn’t have left the junction but the insurance companies went 60/40. (In my favour)

Trixie62 · 13/11/2025 18:34

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?

Car y at fault as should give way to the right

Trixie62 · 13/11/2025 18:34

Car y at fault as should give way to the right

Autumvibes · 13/11/2025 18:38

Car Y. However car X should have been approaching carefully knowing the left side of them was queued.

Laura95167 · 13/11/2025 18:46

prisonerofallisurvey · 13/11/2025 10:39

I can't picture the scene from your description. Can you add a diagram please?

Literally here expecting, and hoping for, a diagram

RubySquid · 13/11/2025 18:51

mumofbun · 13/11/2025 18:02

Not if car X was already nearly past where car y was entering. It sounds to me like they clipped the back of car X whilst entering at speed!

I've done a rudimentary drawing of my understanding which will hopefully load up

But that's car Y drivers side not passenger surely

KarmenPQZ · 13/11/2025 18:55

No it’s the front but on the passengers side because she’s swung out wide to turn.

x was really unsafe driving so fast. Especially if it was indeed dark and Y had their lights on. X would have had to see those lights really clearly

Mightymooo · 13/11/2025 19:00

RescueMeFromThisSilliness · 13/11/2025 17:13

A vehicle already on the roundabout has priority over any joining traffic. That's it.

Yes I'm pretty sure it's that simple, I wouldn't stress about it. You were already on the roundabout, they drove into you. It being dark and the colour of your car are irrelevant

GrumpyMenopausalWombWielder · 13/11/2025 19:02

Laura95167 · 13/11/2025 18:46

Literally here expecting, and hoping for, a diagram

If the OP gives us the location of the r/a, where she entered & was intending to exit, and where the other car came from, we can all go off & check out Google maps to see if that helps. 🤞

GrumpyMenopausalWombWielder · 13/11/2025 19:04

Mightymooo · 13/11/2025 19:00

Yes I'm pretty sure it's that simple, I wouldn't stress about it. You were already on the roundabout, they drove into you. It being dark and the colour of your car are irrelevant

On a simple one lane r/a, that applies. But this sounds bigger, has 2 lanes all the way round, and could be large enough for Y to enter the r/a, become fully established in the left hand lane with the intent to proceed straight across (like the OP) and find themselves in a collision because another car cuts across their lane to exit.

We need a diagram or accident location to work it out. 🤓

EeyoresLostTail · 13/11/2025 19:13

I would think its Car Y that is at fault as Car X had already entered Roundabout and surely if they had done a long journey maybe their Concentration was slipping saying it was a Black Car at night is no excuse

Just out of curiosity OP Are you X or Y?

KarmenPQZ · 13/11/2025 19:13

Mightymooo · 13/11/2025 19:00

Yes I'm pretty sure it's that simple, I wouldn't stress about it. You were already on the roundabout, they drove into you. It being dark and the colour of your car are irrelevant

I really don’t think it is because there’s 2 lanes. If X was going at 30 then Y was almost certainly there first but was having to nose through traffic where as X came later but with wild speed because 1 lane was clear.

onedogatoddlerandababy · 13/11/2025 19:16

Y. Whoever wasn’t coming from the right will be in the wrong. Obviously drivers should be aware, particularly where a gap has been left, but if I was taking advantage of that gap, I would be looking very carefully to my right to make sure traffic on the r/about with right of way wasn’t coming towards me.

Silvers11 · 13/11/2025 19:17

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?

Yes - this doesn't make sense to me either! She says they were both approaching in the same approach to the roundabout. Car x in the right lane and car Y was in the left lane, which cars had moved over to, in effect, give a third 'lane' for those going straight ahead. None of it makes sense to me. Can't comment more without a diagram

weirdthread · 13/11/2025 19:53

Car Y. They should have given way.

I can picture this as I had a similar situation (without the collision, as I was going slow and stopped to let the idiot past). Given the lack of visibility due to queued cars you could probably have been going slower in anticipation of this kind of situation with another car, but that doesn't make you at fault. Car Y should also have crept out in anticipation there could be a car coming through the inside lane.

weirdthread · 13/11/2025 19:54

Silvers11 · 13/11/2025 19:17

Yes - this doesn't make sense to me either! She says they were both approaching in the same approach to the roundabout. Car x in the right lane and car Y was in the left lane, which cars had moved over to, in effect, give a third 'lane' for those going straight ahead. None of it makes sense to me. Can't comment more without a diagram

I read it as car Y was coming from the left (another round about entry).

mumofbun · 13/11/2025 19:56

RubySquid · 13/11/2025 18:51

But that's car Y drivers side not passenger surely

Edited

No, in the UK (I assume it's the UK from everything I've read) the left of the car is the passenger side

Jopo12 · 13/11/2025 19:57

No doubt Car Y at fault.
The colour of a car is irrelevant.
If there are 2 lanes of traffic, and one lane leaves a gap for another car to join, that doesn't mean that the other lane is free.

JustMyView13 · 13/11/2025 20:15

LadyTyburn · 13/11/2025 10:41

You need Big Jobber and his liability videos. I can almost hear his voice, discussing who was proceeding correctly in their lane!

🤣🤣🤣
Came here to say this!
Without the footage, hard to tell whether this is a case of Grace & Tanner, or a straightforward liability case. We need the expert!