I was approaching a roundabout intending to go straight on (2nd exit) when I noticed another car moving at speed toward me

with its L/H indicator going. I slowed down and decided to stop. The other car barely paused and crossed in front of me

and this red icon came on momentarily. I was stationary with my foot firmly on the brake.

This may sound slow but the incident was really over in seconds. Why the icon?

It sounds like collision avoidance, presumably the other car was directly (all of part) in front of you and coming towards you on what appeared to be your side of the road.   Basically calculated that if both continue straight would be head on collision 

 

It would normally have put brakes on, if you didn't react, but sounds like you already had braked, so didn't do this.

 

I have had similar, usually on country roads with slight kink shaped bends, which means coming towards you until point where it turns.

 

You can set the sensitivity in settings  set it to LATE so it doesn't recognise cars at junctions if you are turning left 

Edited 17 March, 20233 yr by skoda1982

Thank you all for your comments, I have a particular dislike for that roundabout!