Erdogan Saffet, Yilmaz Ibrahim, Baybura Tamer, Gullu Mevlut
Afyon Kocatepe University, Faculty of Engineering, Department of Geodesy and Photogrammetry, Ahmet Necdet Sezer Campus, Gazligol Road, 03200 Afyonkarahisar, Turkey.
Accid Anal Prev. 2008 Jan;40(1):174-81. doi: 10.1016/j.aap.2007.05.004. Epub 2007 Jun 15.
Geographical Information System (GIS) technology has been a popular tool for visualization of accident data and analysis of hot spots in highways. Many traffic agencies have been using GIS for accident analysis. Accident analysis studies aim at the identification of high rate accident locations and safety deficient areas on the highways. So, traffic officials can implement precautionary measures and provisions for traffic safety. Since accident reports are prepared in textual format in Turkey, this situation makes it difficult to analyze accident results. In our study, we developed a system transforming these textual data to tabular form and then this tabular data were georeferenced onto the highways. Then, the hot spots in the highways in Afyonkarahisar administrative border were explored and determined with two different methods of Kernel Density analysis and repeatability analysis. Subsequently, accident conditions at these hot spots were examined. We realized that the hot spots determined with two methods reflect really problematic places such as cross roads, junction points etc. Many of previous studies introduced GIS only as a visualization tool for accident locations. The importance of this study was to use GIS as a management system for accident analysis and determination of hot spots in Turkey with statistical analysis methods.
地理信息系统（GIS）技术一直是用于可视化事故数据和分析高速公路热点的常用工具。许多交通部门一直在使用GIS进行事故分析。事故分析研究旨在识别高速公路上事故发生率高的地点和安全缺陷区域。这样，交通官员就可以实施交通安全的预防措施和规定。由于土耳其的事故报告是以文本格式编写的，这种情况使得分析事故结果变得困难。在我们的研究中，我们开发了一个系统，将这些文本数据转换为表格形式，然后将这些表格数据地理参考到高速公路上。然后，采用核密度分析和重复性分析两种不同方法，对阿菲永卡拉希萨尔行政区边界内高速公路上的热点进行了探索和确定。随后，对这些热点的事故情况进行了检查。我们发现，用两种方法确定的热点反映了诸如十字路口、交汇点等真正存在问题的地方。以前的许多研究仅将GIS作为事故地点的可视化工具。本研究的重要性在于将GIS用作事故分析管理系统，并通过统计分析方法确定土耳其的热点地区。
