She was great in the car until I drove over the serrations on the side of the highway that wakes drives before they run off the road. That noise is embedded in my dogs subconsciousness or ???? She is a very powerful dog and I can no longer take her with me. She is stressed to the max and tries to get under my legs while I'm driving. Any thoughts? I bought a crate as a last resort, but would like to hear from dog workers or specialist.