Sae-ngow, P., N. Kulpanich, M. Worachairungreung, P. Ngansakul, and T. Prasert. “Geospatial Analysis for Identifying Blackspots on National and Rural Highways in Thailand”. International Journal of Geoinformatics 20, no. 4 (April 30, 2024): 29–42. Accessed May 8, 2026. https://ijg.e-geoinfo.com/index.php/journal/article/view/3147.