If you driving in the dark in a car then you would be putting yourself in a dangerous situation for absolutely no good reason and you could end up jeopardizing your life. This will lead to you getting into some major trouble. In your dreams you are safer but this does not mean that dreams about these things are good.
If you have a dream where you are driving in the dark this means that you have just started going through a period in which you feel a bit out of control. You are literally driving blind somewhat and you can only see so far ahead of you. Perhaps you are having this dream because your view of your own future in life has just become a bit limited, you feel like you are being pushed back and that you won’t be able to make it.