STUDY OF LOW-VISIBILITY HAZARD BASED ON TRAFFIC EXPOSURE
With development of traffic industry (airlines and highways), road and air space visibility has become more and more important. Low-visibility has become one of the main causes for traffic disaster. Low-visibility disaster cases can be classified by theory of disaster system. Low-visibility hazard classification system, made of heavy fog, heavy rain, dust storm and snow, was constructed, and chain of low-visibility disaster was proposed. The relative disaster frequency as disaster fatalness index was considered, atlas for single disaster was made, and style-frequency map of low-visibility by special overlay analysis in GIS was formed. Space layout and the law was investigated. It was found that high-danger district for heavy fog covers 24% highways, and 16. 6% airports all over the country; high-danger district for heavy rain covers 18% highways, and 2. 9% airports. Tetrad low-visibility disaster district covers 38 cities, or 22% population. Triple low-visibility disaster district covers 308 cities, or 57. 9% population. So the integrated assessment of low-visibility disaster gives very important guidance and has practical significance for risk avoidance for traffic administration.
国家科技期刊平台
NSTL
万方数据
维普
