Thanks guys, appreciate the comments and feedback.
I love an extra dollop of saturation on my images and star trails really work well for that.
The light from the car turned out to be a bonus, that's for sure. It zooms past in 3 frames in the timelapse and can barely be noticed, but really adds to the scene in the star trails stack. It wouldn't be the same image without it.
I almost called the image "Into the Vortex".
Thanks again for your comments.