| Title |
Analysis of Urban Network Operability and Crash Risk Change Caused by Rainfall Using Two-fluid Model Parameters |
| Authors |
이재현(Lee, Jaehyeon) ; 모대상(Moh, Daesang) ; 김선호(Kim, Sunho) ; 이청원(Lee, Chungwon) |
| DOI |
https://doi.org/10.12652/Ksce.2020.40.2.0167 |
| Keywords |
Two-fluid 모형;교통사고 위험;강우;교통류 특성 Two-fluid Model;Crash risk;Rainfall;Traffic flow characteristics |
| Abstract |
The Two-fluid Model, proposed by Herman and Prigogine in 1979, is a macroscopic model for describing network operability in urban networks. Since the Two-fluid Model parameters change according to the traffic flow characteristics, it is necessary to identify the cause of flow change when analyzing the operability using the parameters. This study compared the crash risk according to rainfall using the Two-fluid Model parameters, and explained that the driving behavior affects the operability of the urban network. The results of the parameters estimation showed poor network operation under rainfall condition. The factors of drivers' crash risk perception model were calculated, and driving behavior was analyzed due to crash risk according to rainfall. In both the morning and evening, drivers tended to slow down their speeds to reduce the crash risk, because the risk on rainy days could be high when the speed was the same as on a sunny days. However, the crash risk was still higher on rainy days than sunny. In the future, it is necessary to analyze the relationship between the network operation and the crash risk in various networks and to improve both. |