DD was exactly like this and so was my SIL's baby (who is 3 weeks younger than DD). One day we had them both in the car with us and they cried in unison EVERY time we stopped at traffic lights and stopped at the same time as soon as we started driving again. We were in fits of laughter because there really was very little else we could do.

We found driving on rough road worked, not hard to do in Townsville - the pot hole capital of the universe. My brother actually used to go out of his way to drive over speed bumps because it settled down his son.

I found sometimes that it was just easier to do short trips when I had to go out and just drive without stopping because stopping seemed to just prolong the pain for DD and for me. She would scream whenever I drove anywhere until she was about 3 - 4 months old. I remember feeling relieved if the crying ever stopped and then completely freaking out that she had stopped breathing and then relieved that the crying had started again because I knew she was alive.

It got better eventually and she just loves the car now. We tried so many things and nothing really worked to settle her. In the end I think she just grew out of her hate for car trips but I had a lot more gray hair to show for it

I hope your DD settles down soon - it really is not an easy time having to drive in the car with a crying baby