Reliable Automatic Incident Detection (AID) Systems are crucial elements in the integrated urban and inter-urban traffic control management environment. Several technologies have been tested to provide basic data for AID, nevertheless the loop based systems are far the more extensively used. A new approach using image processing especially oriented to AID was developed in the frame of the CEC DRIVE Programme (Project INVAID 1989-1991 by a multinational consortium. The AID system is based on the analysis of video images from CCTV cameras situated in strategic sites along side the road, carried out in processing units (LSM) which produce meaningful real time spatial referenced data. These data are further processed at central level by the Central Process System (CPS) to produce their spatial and temporal tracking, to detect and follow up incidents and congestions throughout the road network.
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