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Highways Agency CCTV
The current UK Highways Agency CCTV system is called 2nd Generation CCTV.〔(【引用サイトリンク】url=http://tv.theiet.org/technology/management/933.cfm )〕 This CCTV system has been produced from a set of specification developed by the Highways Agency, to allow it to effectively monitor traffic on England motorways and trunk roads. The network currently includes over 1500 cameras operated from 7 regional control centres across England.
==History and Background==
The Highways Agency’s original CCTV system or Highways Agency Surveillance CCTV system was used primarily to assist the police with the management of traffic on motorway and trunk roads. It was typically formed out of a number of smaller networks working in isolation. Each of these small networks consisted of between 10 and 100 cameras that provided images to a single control room and had little provision for third parties. These networks often required a specific manufacturer’s camera, restricting the Highways Agency’s control over technology and cost.
As the use of CCTV became more important third parties (e.g. fire service, motoring organisations, radio stations) began to require controlled access to road images and the business case for a more nationally controlled network became apparent. Therefore to maximise control over its own assets the Highways Agency decided to develop its own CCTV protocols and specifications called 2nd Generation CCTV.
Around the world countries that have mature Intelligent Transport Systems (ITS) for traffic monitoring have implemented similar protocols, such as in the USA with National Transportation Communication for ITS Protocol (NTCIP).〔(【引用サイトリンク】url=http://www.ntcip.org )〕 However in countries where traffic monitoring CCTV is in its infancy the use of individual manufacture CCTV protocols (e.g. Pelco D) is more wide spread.
抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』
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