## 2 Methodology  
### Meteorological Event Responsiveness  
This paper proposes a new method for identifying accident-prone highway sections under complex meteorological conditions by establishing the concept of meteorological risk responsiveness. The meteorological risk response index is the response degree based on traffic accident data, road design documents and meteorological data proposed by the accident-prone road section identification index; the main constituent parameters are: a meteorological event carrier, meteorological events, and a meteorological event response \begin{table}
\begin{tabular}{c c c c} \hline \hline
**Identification Method** & **Merit** & **Weakness** & **Application Condition** \\ \hline Absolute & 1 & Concise and intuitive; 2 & 1 Single evaluation factors; 2 & 1 Road sections with more comprehensive traffic accident data; 2 & 1 Intersection section \\ Accident Number & 2 & Computationally simple & 2 & 1 Section with more comprehensive traffic accident data \\  & 2 & & 2 Evaluation factors are not comprehensive enough & 2 & 1 Section with more comprehensive traffic accident data \\  & 1 & Traffic volume and road length are considered; & 1 The particularity of some accidents is not considered & 1 Road conditions, traffic conditions change compared with the path section \\  & 2 & Accuracy & 1 & 1 Lack of consideration of the accident attributes; 2 & 1 Road section with more comprehensive vehicle driving data \\  & 1 & Traffic accident data requirements are low; & 2 & 1 Large calculation volume; 2 & 1 Various sections \\ Safety Coefficient & 2 & Computationally simple & 2 & 1 Factors such as traffic volume are not considered; 2 & 1 Road sections with obvious differences in accident conditions \\  & 2 & & 2 Route division mode has a great influence on the results & 1 & 1 Road conditions, traffic conditions change compared with the path section \\  & & & & \\ Quality Control & 1 & High accuracy; 2 & 1 The “low frequency high frequency” and “low frequency high frequency” sections cannot be directly judged & 1 & 1 Road conditions, traffic conditions change compared with the path section \\  & & & & \\ \hline \hline \end{tabular}
\end{table} 
Table 1: Evaluation of the applicability of identification methods for accident-prone road sections. mechanism. The numerical value of the response degree is used to characterize the impact of different meteorological events on each section of the highway, and at the same time, the accident-prone road sections that are affected by adverse meteorological influences are effectively screened. 1. Meteorological event carrier. The event carrier of the meteorological event response degree is the route unit. According to the current status quo, there is no clear regulation on route division, and most consider the method of route division mainly based on experience and simplicity. Common road segmentation methods [29] include the average road segment method, uneven road segment method, fixed step method, dynamic step method, etc. 2. Meteorological events. That is, the basic unit of meteorological risk responsiveness composition; its essence is the meteorological conditions as the basis for division of the meteorological event carrier on the accident division of the traffic accident set obtained, and the core of the meteorological event responsiveness is through the calculation of the number of responses to meteorological events to respond to the degree of impact of different weather on the roadway. In view of the complexity of meteorological changes, this paper selects the changes in weather as the weather event division method and divides the set of traffic accidents occurring under the same type of consecutive meteorological conditions into one weather event in the time dimension, with the advantage of effectively analyzing the degree of impact of the same adverse weather on the same road section.