Perimeter security

thumb|A wooden fence thumb|During the Cold War, West German trains ran through [[East Germany. This 1977 view shows how East German authorities placed fences near the tracks to keep potential defectors at bay]]

selective restriction of access to a place or other resource, allowing only authorized users

shock barrier to contain animals or people

A chicane () is a serpentine curve in a road, added by design rather than dictated by geography. Chicanes add extra turns and are used both in motor racing and on roads and streets to slow traffic for safety. For example, one form of chicane is a short, shallow S-shaped turn that requires the driver to turn slightly left and then slightly right to continue on the road, requiring the driver to reduce speed. The word chicane is derived from the French verb chicaner, which means "to create difficulties" or "to dispute pointlessly", "quibble", which is also the root of the English noun chicanery.

material security measures that are designed to deny unauthorized access to facilities, equipment and resources and to protect personnel and property from damage or harm

lightweight construction material made by weaving thin branches or slats between upright stakes to form a woven lattice

barricade commonly used at public events

identification and authentication device

Temporary closure of a place

component which prevents passage into a dangerous area, commonly used to mitigate risk