Not everyone has unlimited time for a motorcycle trip. I used to ride the freeway for a couple days to get out West to where the fun riding was. Though I never slept in a rest area, there were times when I was extremely tired, and places to sleep were slim. I don't think anyone really wants to sleep there, it is just a question of sleep or getting in an accident. I've been there, falling asleep while riding. Luckily it was daytime, and safe to sleep on a picnic table in a rest area for an hour.