These areas are generally open to anyone and are the least secure of the three zones. This is particularly true when the zone is located within a building or in an area with uncontrolled access and little or no opportunity for close surveillance. They are accessible to the public, but are set off from the public zone. This separation is accomplished with design features that establish definite transitional boundaries between the zones. These are areas of restricted entry.
Access is controlled and limited to specific individuals or groups.
A private residence is a good example of a private zone. Division between zones is generally accomplished with some type of barrier. These can be either physical or symbolic. Physical barriers, as the name implies, are substantial in nature and physically prevent movement. Fencing, some forms of landscaping, locked doors, and the like are examples of physical barriers.