Multi-level Hierarchical Layout Method of Large Scale Subgrade-type Traffic Detectors under Disaster

Real-time traffic information acquisition is the key to traffic emergency organization under disasters. Taking subgrade-type detectors as study contents, this paper proposed a multi-level hierarchical layout method. Firstly, based on road network topology structure characteristics, the method applied graph theory to solve detector layout in large scale network. Secondly, from traffic volume space-time distribution perspective, the method used correlation and cluster analysis to further optimize the detector layout in regional network. And at last, according to the cost and anti -disaster capability of various detectors, it used linear programming to complete the layout for subgrade-type detectors on microscopic-level. Experiment showed that this method satisfied the normal and disaster traffic information acquisition.