I have dissociated while driving before. The worst instance of it for me was trying to go pick up dinner from a takeout place. It took me three or four tries to get there, as I kept ending up at other destinations and confused about why I was there. This was during a period of time in which I was not doing well. It still happens sometimes, but I usually catch myself mid process and correct it or the person riding with me will be like "hey your going the wrong way to get there". I've literally driven several million miles over the years, so I assume I am driving safely, obeying traffic laws and watching out for hazards even though I sometimes have no knowledge of pieces of time.