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Line 9: The system replaced the Automatic Incident Detection '''(AID)''' system which was trialled in 1989 on an {{convert\|83\|km\|0}} section of the [[M1 motorway]].<ref name="hacost" /> MIDAS was first operated on the M25 in the SouthWest quadrant before the section went live with a variable speed limit. By March 2006, ~~the~~ [[National Highways ~~Agency~~]] aimed to have MIDAS installed on more than {{convert\|910\|km\|0}} of the English motorway network.{{specify\|date=December 2011}} ==See also==

Motorway Incident Detection and Automatic Signalling: Difference between revisions