As you pull into a rest area, it's important you remain alert. Take note of the stop's name or the closest mile marker, so if you have an emergency you can give the authorities your location. Avoid individuals who seem to be hanging around parking lots and restrooms; that's a good indication he or she is up to no good. It's also a good idea to stay away from places where criminals might hide. Don't park beside large trucks, which can block your view of the parking lot. When you're walking up to the building, be wary of blind corners, recessed areas and thick vegetation. A well-designed rest area will have a rectangular design with few walls or bushes behind which people could hide.