Sus, fw used to do that with the aggresive driving, I've learnt to keep quiet if he has altercation with another driver as me asking him to slow down or whatever makes it worse. admittedly he is a lot better than he was, but I would never discuss a difficult subject with him whilst in the car now.
Two main incidents stick out to me, once when I was heavily pregnant with our first and he was up to something and never around etc, this was brought up in the car and he started driving aggressively and I was getting thrown around a bit and he could see I was in pain and getting distressed, he also shortly after baby was born threatened to drive us into a wall and did but breaked at last sec, because I wanted to separate.
The other time was when a driver pulled out on him, we had the two children in the back, my DD so little she was still in a rear facing seat, he started tailgating this car and the usual foul language spouting out, we got the impression the driver was drunk so he wanted to follow him and told me to call the police which I did, he continued to follow after I had reported it and the more I told him to stop the worse he got and was speeding to keep up, we ended up going quite out of our way, he overtook another car and we came inches away from colliding straight into a double decker bus! at that point I screamed enough and luckily he stopped.
He hasn't done anything quite as bad since but gets very irate if someone cuts him up or something and always swearing with the kids in the back.
god it just reminds me how much I've put up with.
But yet he keeps arguing what a good dad he is!!
anyway bit of an update, again he wouldn't pay a bill and I asked him for a week to pay it, we had a little argument about it and it was obvious he wasn't gonna do it so I said I would have to pay it and borrow money, he said fine and went out in a huff, I cried in front of the kids after that as I have barely any money anyway and he does this every month with this bill! I told the kids daddy won't pay the bill and they were cuddling me etc, another unpaid reminder for another bill came through a few days later and my DD just looked at me and said are you gonna get upset mummy :-(
so because of all this money stuff and the fact that he seems to just be coming and going as he pleases, supposedly working the past few weekends, hasn't offered to help with Xmas presents either, we had a bit of an argument and he told me to shut the fuck up, but then I did call him an arsehole. again he reiterated what a good dad he is (Yeh seeing his new potential gf instead of them) and how he pays half the bills (Yeh that's why I had to pay one he should have) and everyone can see what a good dad he is even though he has to put up with my shit and stress at home, and that people can see what people are like (some sort of thing towards me?) I think I put up with a lot more than most would but what he is telling his friends and family I don't know
anyway it turns out he was already in a mood as this girl he has been chatting to had told him she wasn't sure of anything happening between them, long story but I ended up speaking with her as he had gone awol and decided not to show to work and ignore everybody for a morning, so I don't think anything really happened between them but he was obviously pursing her as she said she knew he liked her.
since then we haven't really spoken to each other he seems in a mood, im just worrying that if she has put a stop to anything happening with them he may now be less likely to move 
he was out all day again yesterday and went to an event and stayed the night, where I don't know, but I think the kids are getting used to him not being around, and it's so much calmer now he isn't here so much, it's just going to prove this is the right thing, the kids seem happy, there's never any shouting or things just getting out of control, I feel happier but am just tired as I'm doing everything now and still have the stress of money difficulties as he won't help but I can't claim for help until he goes, with Xmas coming it's hard but I will get there, it's worth it for him to be gone soon
I think he is being funny with money to try and prove a point that he needs money to move, even though he hasn't moved yet so can still pay the bills here, where he is living? but hey Ho I will manage 