Corky (and others): the point here is to capture motion from the road lights while having the car interior itself look solid. To do this you necessarily have to have a lengthy exposure time (half-second at least). But to get the car's interior looking good and sharp, there has to be no relative motion between the camera and the car while the exposure is taken. (If the car itself is a rattletrap, this kind of shot is basically impossible.) Of course I guess you could just paste two exposures together and get the same effect, but there are people who get good results with just one frame. This kind of frame is almost a sub-sub-genre of photography in its own right. Here are a couple of good examples:
http://www.flickr.com/photos/jmmpereda/3655439752/
http://www.flickr.com/photos/lazyousuf/3112028635/sizes/l/
http://www.flickr.com/photos/psycho_crow/2948242366/
http://www.flickr.com/photos/fredthomas/3540104839/
It looks like there's a flash or two in the car in most of these. that would certainly get the shutter speed down.