Controlled-access highways in Thailand are systems that can be used only by cars, trucks, and certain types of buses, forming a spider-web network around the Greater Bangkok area and eventually covering the entire country.
The first system, known as the "Intercity Motorway," is owned and operated by the Department of Highways.
The first controlled-access highway in Thailand is the Din Daeng - Tha Ruea section of the Chaloem Maha Nakhon Expressway, opened on 29 October 1981, linking Vibhavadhi Rangsit Road to Bangkok Port with a total distance of 8.9 kilometers.
(Southern part of Kanchanaphisek Road) Gulf Energy
• Bangkok's 2nd Ring Road 1995; 30 years ago (1995) (renumbered to Highway No.37)1996; 29 years ago (1996) (renumbered to Motorway No.9)