ในปี พ.ศ.2539 กรมทางหลวง กระทรวงคมน

In 2539 (1996) Department of highways The Transport Ministry has introduced study results projects developing highways through Thailand for the country. (The Toll Highway in the Kingdom of Thailand Development Study, 1991) and make the "master plan of the construction of the highway between the cities of the country Thailand special."

In 2539, Department of Highways. The research project has developed a highway toll for Thailand (The Toll Highway Development Study in the Kingdom of Thailand, 1991) was updated and prepared. "The master plan of the construction of the highway between the cities of Thailand."

The 2539 department, Ministry of transport, the education project development highway toll ทางสำหรับ Thailand (The Toll Highway. Development Study in the Kingdom, of Thailand1991) to improve and guidelines. "The master plan of the construction of the motorway between cities."