Motorway Incident Detection and Automatic Signalling, usually abbreviated to MIDAS, is a UK distributed network of traffic sensors, using either inductive loops, or using Radar and magneto-resistive wireless sensors, which are designed to alert the local regional control centre (RCC) to traffic flow and average speeds, and set variable message signs and advisory speed limits with little human intervention. Companies such as RAC, TomTom and Google use this traffic flow data via halogens reporting systems.