Local or neighborhood roads form the bulk of urban road network and are responsible for the last mile connectivity. They are highly vulnerable to earthquake-like hazards, causing road closures of magnitude ranging from small traffic diversions to isolation of entire neighborhoods. Such disruptions impede the emergency response, and significantly affect the post-disaster recovery. Hence their design, construction, and maintenance are of utmost importance for efficient working of transportation systems. In this article, we study the accessibility of local roads based on intrinsic and extrinsic determinants of vulnerability with a focus on Indian cities. The methodology divides the road network into two components. The first one is the inaccessible stretch of the road network due to its width (Intrinsic Vulnerability), and the second one is the accessible stretch of the road network prone to road closures due to collapsed buildings (Extrinsic vulnerability). Then a three-step framework, namely road network inventory development, building vulnerability assessment, and road closure analysis, is proposed for vulnerability assessment. For this purpose, 77 km of road network and 612 buildings are studied in three selected wards of Siliguri Municipal Corporation (Seismic zone IV). A comparative analysis between the wards for the change in accessibility levels before and after an earthquake is done. The results are measures of inaccessibility in the road network, which are also visualized as isolated streets on the maps. The proposed framework aides an urban planner and an emergency manager to identify the vulnerable parts of road network and take necessary mitigative measures.

局部或社区道路构成了城市道路网络的主体，并负责最后一英里的连通性。他们极易遭受类似地震的危险，导致道路封闭，从小规模的交通改道到整个街区的隔离，不等。此类中断会阻碍应急响应，并严重影响灾难后的恢复。因此，它们的设计，构造和维护对于运输系统的有效运行至关重要。在本文中，我们将基于脆弱性的内在和外在决定因素研究本地道路的可及性，重点是印度城市。该方法将道路网络分为两个部分。第一个是由于道路网的宽度（固有漏洞）而无法到达的延伸，第二个原因是由于建筑物倒塌而容易造成道路封闭的道路网无障碍延伸（外部脆弱性）。然后，提出了一个三步框架，即路网清单开发，建筑脆弱性评估和道路封闭分析，以进行脆弱性评估。为此，在锡利古里市政公司（地震四区）的三个选定病房中研究了77公里的路网和612栋建筑物。进行了地震前后病区之间可访问性水平变化的比较分析。结果是在道路网络中无法通行的度量，这些度量也可视化为地图上的孤立街道。