Proper lighting can go a long way in discouraging crime at rest areas. Buildings are often well-lit, but look for places where the parking lot is illuminated as well. At night, avoid the peripheral parts of the rest area, like picnic tables, trails and surrounding woods, where illegal activity sometimes occurs. At rest stops where crime is particularly bad, frequent police patrols or even permanent security officers may be present. If this is the case, approach the trooper or security guard and ask them to look out for you while you visit the facilities, especially if you're alone.