Suttishe, Palida, Nikorn Sirivongpaisal, and Wanatchapong Kongkaew. 2019. “The Simulation of Commercial Vehicle Border Crossing of Thailand – Malaysia : Case Study of Sadao Border, Songkhla”. RMUTP Research Journal Sciences and Technology 13 (2). Bangkok, Thailand:1-12. https://doi.org/10.14456/jrmutp.2019.17.