It could be post traumatic stress syndrome, but I would not reach that conclusion yet. You just need to work out your feelings in regards to the traffic accident. I believe that best thing to do in this instance is work through your feelings and go in as many car rides as possible. The worst thing in the world is to let the fear take control of your life. Just to let you know, I was in a minor car accident in 2003, I spun out in a snow storm. I was a bit afraid to drive after that, heck, I even still drove the same car. Anyways, your emotions are normal, there is no reason to feel that you're abnormal or anything.