If he goes to college or other school far enough away from home, you get a break on your policy, even if he is still on it. Typically the insurance company wants to know how many licensed drivers are living in your house and they base much of your premiums on that.

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1985 380SE Blue/Blue - 230,000 miles
2012 Subaru Forester 5-speed
2005 Toyota Sienna
2004 Chrysler Sebring convertible
1999 Toyota Tacoma