Vulnerability is a good indicator to reflect the road capacity and previous researches mainly concentrate on the vulnerability modeling in critical link and analyzing with simulated topological road network. This study proposes a new methodology for evaluating vulnerability of urban road network based on the concept of macroscopic fundamental diagram (MFD) which is derived by comparing the behavior of the MFD under actual conditions with that under theoretical conditions, while the Real-time Vulnerability Index (RVI) that enables real-time measurement and monitoring of road vulnerability is calculated as a sliding average per hour. Using empirical data from Shanghai expressway, we demonstrate applicability and validate the proposed method in real traffic scenarios. Results show the RVI is effective in reflecting spatial characteristics like bottlenecks or traffic congestion on the road in real time once they occur on the index. The index is well placed to provide management advice to road management authorities.
Vulnerability Analysis of Urban Expressway Based on Macroscopic Fundamental Diagram
22nd COTA International Conference of Transportation Professionals ; 2022 ; Changsha, Hunan Province, China
CICTP 2022 ; 1424-1434
2022-09-08
Conference paper
Electronic Resource
English
Real-time Vulnerability Analysis of Urban Expressway
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