The majority of the fault obviously lies with the driver of the other car; the manner of their driving led to a dangerous situation. However, a certain amount of responsibility I think lies with you. Once you were aware of the developing situation you could have adjusted your speed. You were aware there was a slip road, and that they maybe other cars attempting to join the motorway, and we all know that there are people out there whose driving falls below a satisfactory standard and think it is ok to drive like this.
I'd rather not have a collision, than be in the right with a damaged car and injuries. Think defensive driving. It would be nice if everybody followed the rules of the road, until then we have to drive for other people.
I had just joined at that slip road and this other car was BEHIND me on the slip road. An artic moved out into the middle lane to allow us in, with another artic coming up in the inside lane. I speed matched the one behind me and the overtaking one was by my rear right wheel.
If I brake I have an artic up my arse, if I swerve I have an artic in my right wing, if I accelerate I ram the vehicle in front.
I was taught, as a car driver, an HGV driver and a PSV driver, that you should never take an action that causes another vehicle to accelerate, brake or move on the road. I was also taught that mirrors are as important as looking forwards, so I KNEW what was behind me and to my right.
This idiot "undertook" me, forced his way on, and then undertook other vehicles. Luckily for me the artic driver in the middle lane reacted to the sound of my horn blowing and braked, allowing me to move. The 44 tonne artic behind might not have reacted had I braked, and there is no reason for him to expect me to brake.
I completely fail to see how "I have to take responsibility" for this incident, where a prat totally ignores "Give Way" road markings, or what I could have done SAFELY ...... note the last word... it's in capitals for your benefit.