On a busy highway, an area just off the main road is available for parking. These are called layovers or rest areas. Sometimes there is a curb. Sometimes there is a rest room or vending machines for drinks and snacks. Sometimes there are full-scale restaurants and souvenir shops. Parking is risky. These areas typically are not supervised and are often the haunt of criminals such as prostitutes and drug dealers. Homosexuals gather in these areas to "do their thing" and often attract the attention of the police.