Spatio-Temporal Analysis of Road Accident on Highway 2 between Nakhon Ratchasima Intersection and Joho Intersection

This study analyzes the spatio-temporal distribution of road accidents along Highway No.2 between the Nakhon Ratchasima and Joho Intersections by integrating Geographic Information Systems (GIS) with spatial and temporal analysis techniques. This study used road accident data from 2019 to 2021 to evaluate accident frequency through mean center analysis and kernel density estimation. Additionally, spatial cluster analyses using Moran's I and Getis-Ord Gi* were employed to identify statistically significant accident clusters. Results showed that accidents were concentrated primarily at intersections and road curves. Clustering analysis revealed a random distribution pattern over the three years, while hotspot analysis at 99%, 95%, and 90% confidence levels identified significant hotspots at intersections and curves, with cold spots distributed along other road sections. The findings provide essential insights for developing preventive measures to reduce road accidents in Nakhon Ratchasima Province.