The Examination of Urban Road Hierarchy in Regards to Accessibility of Gathering Points in Case of Disaster

Abstract

As it known, roads constitute the backbone of any cities and also determine the urban activity. In addition to this, the vital role of roads and the road network has arise in the event of a disaster for the public and disaster response group. The principal services such as the first aid, food, personal cleaning, etc. are provided through the gathering areas especially in in the first 72 hours in the case of emergence. Accordingly, the accessibility of these areas has a great importance. While the gathering areas are positioning in the city area, there exist definite criteria as these areas' relationship with the road received urban services, the classification of the road and also the road width. This study aims to determine how to make a detailed assessment in the identification of the gathering points that has an important role in case of disaster and emergencies based on the hierarchy of the road received urban services. Two separated analyses are evaluated in this context using Geographical Information Systems (GIS). First one is the relationship between the potential gathering points and the urban road hierarchy in three districts located on the northern axis of Izmir city. Second one is the accessibility based on the relationship between the road width and the building height. As a results of these analyses, the lower ratio of the building height to the road width, the more accessible roads in the case of disaster. The main arterials become prominent in terms of the accessibility opportunities and the sustainability of roads' facilities. As a result of the study, the role of gathering points is critical to examining the accessibility of currents roads and to reduce the disaster risks.

Spor Komplekslerinin Deprem Sonrası Kullanımı ve Potansiyelleri: Kahramanmaraş ve Gaziantep Örnekleri

“…Location/Accessibility: Proximity to transportation networks is an important parameter in the standards for determining assembly areas (Çınar, Akgün, & Maral, 2018;Uyar & Özkan, 2023;Erdin et al) According to Çınar et al (2018), the walking distance to gathering areas should be a maximum of 500 m/15 minutes. In addition, the connection of these areas with the main arteries should be in a way to ensure continuity, including the roads that are at risk of closure during a disaster.…”

“…Şekil 2. Toplanma alanı temsili (Uyar ve Özkan, 2023) Toplanma alanlarının seçimine ve değerlendirilmesine yönelik farklı matematiksel yöntemlerle yapılan çalışmalar da literatürde mevcuttur (Omidvar, Baradaran-Shoraka ve Nojavan, 2013;Yavuz Kumlu ve Tüdeş, 2019;Aman ve Aytac, 2022;Erdin, Celik, Silaydin ve Partigoc, 2023;Şekkeli, 2020). Gökgöz, İlerisoy ve Soyluk'a (2020) göre, acil durum toplanma alanları ihtiyaca yönelik pek çok kriteri barındırması gereken alanlardır.…”