Kimsang, N., Subnawin, S. and Arlai, P. 2025. The Guidelines for Policy Development of the Survey, Design, Improvement, and Traffic Problem - Solving on the Highway No.37 Cha-am Bypass (Phetchaburi - Prachuap Khiri Khan). Journal of Humanities and Social Sciences Suratthani Rajabhat University. 17, 2 (Dec. 2025), 163–191.