Abstract
With the increasing flow of urban rail transit and the increasing scale of the road network, the operational risk of urban rail transit is also increasing. It had great significance to assess the operational safety of urban rail transit. In order to objectively evaluate the risk severity level of the urban rail transit, the author put forward a method based on combination weight and cloud model. Firstly, the risk severity evaluation index system was established. Secondly, the weight of the evaluation index was calculated by AHP method. Thirdly, the security evaluation method based on cloud model was given. Finally, the effectiveness of the method was illustrated by an example.
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