关键词: 道路交通；风险评判方法；泊松分布模型；交通事故数据

Abstract: In order to assist the public security traffic management department in assessing and managing road risk hazards, considering the characteristics of the commonly used "six-in-one" data, a road risk assessment method based on traffic accident data is proposed. Firstly, through mathematical derivation, it is concluded that a Poisson distribution model can be used to study the number of traffic accidents that occur on a certain road within a set unit time. Then, based on the Poisson distribution model, a method for assessing road risk is proposed. Finally, based on the road traffic accident data in Xi'an from 2020 to 2021, this method was practically applied. The results show that the assessment results obtained using this method are basically consistent with the actual situation. This method has certain reference value for the public security traffic management department to control road risks and manage potential safety hazards in a timely manner.

Key words: road traffic; risk assessment method; poisson distribution model; traffic accident data