Natural access control methods make use of spacial definition and circulation patterns. An example of natural design is the use of security zoning. By dividing space into zones of differing security levels, such as unrestricted, controlled, and restricted, sensitive areas can be more efficiently protected. Effective access control is often the key to many crime and security threats. Internal access points in restricted or controlled areas.
Surveillance is directed at keeping intruders under observation.
Organized surveillance strategies include use of police and guard patrols. Territorial reinforcement involves creating physical designs that enhance or extend the sphere of influence so that users develop a sense of proprietorship. This sense of territorial influence can alert potential offenders that they don't belong there, they are at risk of being seen and identified, and their behavior will not be tolerated or ignored. Natural access control and surveillance contribute to a sense of territoriality, boosting security by encouraging users to protect their turf. Organized territorial strategies typically include neighborhood crime watches, receptionists, and guard stations.