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In order to improve the operation safety under disastrous conditions of highway, the classification of highway catastrophic conditions was analyzed. And then the operation safety management and the kinds of countermeasure and foundation of decision-making for emergency disposal against disastrous conditions of freeway were put forward.

Based on the analysis of the technique of floating car, the acquisition accuracy of the floating car data was studied using large amount of collected data, which includes data screening, direction angle, position and spot speed. The research findings define the application scope, which can provide important theoretical instruction to the further data mining and application.