Rest Areas Safe?

Your question is way to broad to be answered. Rest areas open to all traveling public without any security can be dangerous. One rest area I know about has an area reserved just for RV's and the entire rest area is constantly patrolled by a marked car and armed security person. About once every 20 minutes that car drove by. Very safe! Another rest area down the highway about 45 miles has no security and is in a marginal part of town. Very dangerous.