ABSTRACT

This paper introduces a new methodology to evaluate the performance of rural road networks when a link in the network is disrupted due to events such as natural disasters, accidents, and maintenance closures. As a measure of network resilience, we propose a simpler approach to quantify redundancy by introducing two indices that link the concept of road network redundancy with the increase in travel distance of the overall network when a road link fails. We apply the problem formulation to a real-world rural road network which was heavily affected by the 2015 Gorkha Earthquake in Nepal. Based on the results from our analyses, we found these indices easy to use, pragmatic, and reliable for the case under study. With the proposed tool, decision-makers can predict and monitor the performance of rural road networks for pre-disaster (or pre-disruption) planning, thereby ensuring the smooth connectivity for goods and services during emergencies.

摘要

本文介绍了一种新方法，用于在网络中的链路因自然灾害、事故和维护关闭等事件而中断时评估农村公路网络的性能。作为网络弹性的衡量标准，我们提出了一种更简单的方法来量化冗余，通过引入两个指标，将道路网络冗余的概念与道路链路故障时整个网络的行驶距离的增加联系起来。我们将问题公式应用到受 2015 年尼泊尔廓尔喀地震严重影响的现实世界农村道路网络。根据我们的分析结果，我们发现这些指数对于所研究的案例来说易于使用、实用且可靠。使用建议的工具，