To think this is abusive and way out of line?

[Amicablywelldone]

Going through a marriage break up at the moment so tensions are high. I understand theres going to be stress..
However my Dh (ex) behaviour earlier was in my eyes totally nuts and frightening.
He offered to give me a lift to work. I should not have accepted this but I work nightshift and I was tired due to some child related issues earlier in the day so I accepted. I thanked him.
Whilst in the car we ended up having what I wouldn't even class as an argument... maybe a discussion or dispute? No raised voices or hand waving or anything like that.. I just disagreed with something he said and I stated that calmly.
He then dangerously pulled over to the side of the road in the middle of nowhere and demanded I get out of the car...
I was so shocked I just stared at him.
After a few minutes he just started the car up and carried on driving and we sat there in silence. I got out the car and went into work.
I found this really frightening as I had an ex who used to do weird car stuff that left me with quite a lot of anxiety regarding cars. My xdh knows this.

I know I shouldn't have gotten in a car with him in the first place but im honestly at a loss as to how to react.
What do I even say?
Im really in shock.
His low level constant anger is one reason the marriage fell apart but it has escalated recently.
I moved out of the house because he didn't seem to be despite saying he would and was repeatedly coming on to me and I couldn't deal with that any more. So I left but have to regularly come back to the house to care for our 3 children whilst hes at work or away anywhere. (Im in a bedsit houseshare now I couldn't afford anywhere else)

You need to stop engaging with him. You know you’re not working and not going to continue the marriage so speaking about things isn’t going to change anything.

Treat every communication with him like you’re speaking to a work colleague. Take all the emotion out of it and keep it civil and business like.

You are totally right.
Its so hard to do as ive been with him 17 years. Most of my adult life. And he was acting so friendly like he used to be at the beginning. I let my guard down and was engaging with him too much.

Better to pull over to the side of the road until you’re calm than to drive dangerously.

are you still living in the same house?

As I said, treat every communication as if it was a work colleague. Think about what you say or reply before you do and remind yourself that if you were in a work setting that you’d remain emotionless and professional even when faced with something you’d like to react to.

Focus yourself on what needs to happen legally and logistically to separate yourself fully from this man and think about what future you’d like to carve out for yourself.

If he was angry and losing his temper it was better for him to pull over than to carry on driving. It was not abusive. He might have been justified in feeling angry but you haven’t included that part. Just don’t engage with him. Get a parenting app for communication if you need to.