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2. Electric gate - Wikipedia

   en.wikipedia.org/wiki/Electric_gate

   Electric Gate Options. A sliding electric gate with electric motor and backup battery in case of mains failure. Note also the Infrared obstacle sensor located on the wall to prevent the gate from closing while a vehicle or other obstacle is in the way. Driveway gate openers can be the rollback (sliding) type that retracks a gate along the fence ...

3. Electric fence - Wikipedia

   en.wikipedia.org/wiki/Electric_fence

   An electric fence is a barrier that uses electric shocks to deter people and other animals [note 1] from crossing a boundary. The voltage of the shock may have effects ranging from discomfort to death. Most electric fences are used for agricultural fencing and other forms of non-human animal control, although they are also used to protect high ...

4. Gated community - Wikipedia

   en.wikipedia.org/wiki/Gated_community

   Gated community. A gated community (or walled community) is a form of residential community or housing estate containing strictly controlled entrances for pedestrians, bicycles, and automobiles, and often characterized by a closed perimeter of walls and fences. Historically, cities have built defensive city walls and controlled gates to protect ...

5. Crime prevention through environmental design - Wikipedia

   en.wikipedia.org/wiki/Crime_prevention_through...

   Use rambling or climbing thorny plants next to fences to discourage intrusion. Eliminate design features that provide access to roofs or upper levels; In the front yard, use waist-level, picket-type fencing along residential property lines to control access and encourage surveillance. Use a locking gate between the front and backyards.

6. Physical security - Wikipedia

   en.wikipedia.org/wiki/Physical_security

   Physical security involves the use of multiple layers of interdependent systems that can include CCTV surveillance, security guards, protective barriers, locks, access control, perimeter intrusion detection, deterrent systems, fire protection, and other systems designed to protect persons and property.

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   Get AOL Mail for FREE! Manage your email like never before with travel, photo & document views. Personalize your inbox with themes & tabs. You've Got Mail!