Just an FYI...
My auto insurance company just lowered the premium for one of the 3 cars on my policy. Earlier this summer we bought a car for my college age daughter for her to use while she was home for the summer. She did not take the car with her when she went back to school, so I called my insurance company to see if we could save any money. With 3 cars but only 2 drivers in the house, we obviously can't drive all 3 cars at once.
They told me that as long as the school was at least 100 miles away, they could mark her as "Away At School" and cut the premium about in half. That way we can leave the car registered for both our use and for her to use if she comes home for weekends and holidays.