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Motorway Incident Detection and Automatic Signalling, usually abbreviated to MIDAS, is a distributed network of traffic sensors, mainly inductive loops, (trialling at the moment radar technology by Wavetronix) which are designed to alert the local RCC (Regional Control Centre) to traffic flow and average speeds and in ATM (Active Traffic Management) zones, set variable message signs, advisory speed limits along with mandatory speed limits in ATM sections with little human intervention. Companies such as RAC, TomTom and Google use this traffic flow data via halogens reporting systems. It is installed on all sections of the United Kingdom's motorways, such as the congested western stretch of the M25 motorway and much of the M60 motorway around Manchester, the Birmingham box (M6, M5 and M42) and the system has successfully reduced accidents. Additionally, the system is installed on parts of the non-motorway trunk road network including the A14. The system replaced the Automatic Incident Detection (AID) system which was trialled in 1989 on an section of the M1 motorway.〔 MIDAS was first installed on the M25 in 1997, after this section already had the variable speed limit. By March 2006, the Highways Agency aims to have MIDAS installed on more than of the English motorway network. ==See also== * Electronic Monitoring and Advisory System - a similar type of system in Singapore * Freeway Traffic Management System 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「Motorway Incident Detection and Automatic Signalling」の詳細全文を読む スポンサード リンク
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