((Inny))
I dissociate plenty. I think the ideas of using the marble for sound or a timer are good ones. You can train your mind to respond to the sound as a pull to the hear and now. Staying in the present is the challenge, and I think that driving can be somewhat hypnotic so it triggers us.
However, if you don't want to drive, then don't. Simply tell people that you don't want to drive Who cares if they want you to? Tell them you have anxiety because of the accident, then maybe they will help you find a T?
Don't do what you don't feel safe doing. Your safety comes first.
Best of luck and take gentle care.