Hi Elizabeth55, glad you found the group.
In regards to your question about whether pwBPD (people with BPD) who dissociate can drive, you can read a bit on page 2 of this thread over on the "Bettering a relationship" about that very topic:
https://bpdfamily.com/message_board/index.php?topic=352556.0Here is an excerpt from member babyducks:
...the level of emotional dysregulation was extreme. Like I mentioned earlier my Ex was diagnosed Bipolar 1 and BPD. I don't think I said that she had spent years under the care of a very good psychiatric team. She was compliant with medication and committed to therapy. Had done DBT which is considered the gold standard for BPD. Actually, she clinically didn't meet the criteria for BPD any longer in that she didn't self harm and wasn't actively suicidal. Still she did become psychotic. that is where the name borderline comes from - being on the border of psychosis and neurosis. I've told this story here before but when psychotic my Ex believed that the wind was communicating with her. Telling her where to go. So in the car she would take her hands off the steering wheel and 'allow' the wind to steer the car. even with all the treatment she received, and was open to receiving the dysregulations came every 3 or 4 months...
I remember a few other members who have had partners who have reported psychotic-type thoughts while driving with kids in the car.
That being said, I would say that those examples stand out because of the infrequency. As BPD is a spectrum disorder (mild to severe), and as it manifests differently in different people, it really depends on the individual, whether driving is an area where the BPD shows up.
You must have some concerns about your child driving? What's been going on so far?
-kells76