Have always been more apt to speak openly in the car, though I do not have PTSD. Answered yes to both, driving and passenger. However. Should qualify that. Reckon most here are city people. In the city whilst driving I am less talkative, need to concentrate obviously. But most of my driving is in the country, where we live. Thus more relaxed.

Must say though, I find talking easier in general, whilst my hands are busy with other activities. Driving is only one such activity. While doing carpentry, renovating, fishing, gardening and so on, I feel more free to talk.

Jim.