Sarahandit, Phonphana, Chanon Sirikulsathit, and Preeda Musikrak. 2022. “Comparison of highway revenue forecasts using the ARIMA ARIMAX Model”. Chalermkarnchana Academic Journal 9 (2). Sisaket,Thailand:27. https://so19.tci-thaijo.org/index.php/cnujournal/article/view/205.