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A nap will help you recuperate if you are tired, and you will feel rested longer. It can’t replace a good night’s sleep, but it can help you safely continue your trip for a few hours. You can stop in the parking lot of a rest area, a roadside service area, a business, church, or any other accessible area other than the shoulder of the road. In addition to being prohibited on a highway, stopping on the shoulder is not safe, since there is a risk of collision with other vehicles.