We propose a technique to measure the impact of loss of traffic function in a particular area to surrounding areas. The proposed method is applied to the city of Seoul, which is the capital of South Korea with a population of about ten million. Based on the actual road network in Seoul, we construct an abstract road network using 1 km × 1 km grid cells. The link weight of the abstract road network is re-adjusted considering traffic volume measured at several survey points. On the modified abstract road network, we evaluate the traffic vulnerability by calculating a network measure of betweenness centrality for every single grid cell. This study analyzes traffic impacts caused by road dysfunction due to heavy rainfall in urban areas.

中文翻译：

---

基于中介中心性的网格交通漏洞分析

我们提出了一种技术来衡量特定区域的交通功能丧失对周边地区的影响。所提出的方法应用于首尔市，首尔市是韩国的首都，拥有约 1000 万人口。基于首尔的实际道路网络，我们使用 1 km × 1 km 网格单元构建了一个抽象的道路网络。考虑在多个调查点测量的交通量，重新调整抽象道路网的链路权重。在修改后的抽象道路网络上，我们通过计算每个网格单元的中介中心性的网络度量来评估交通脆弱性。本研究分析了城市地区因暴雨造成的道路功能障碍对交通的影响。