Expressway Authority of Thailand

Overview map showing the different sections of the expressway system

The Expressway Authority of Thailand (Thai: การทางพิเศษแห่งประเทศไทย) is a state enterprise under the Ministry of Transport. It was founded in 1972, and operates Thailand's expressway (ทางพิเศษ Thang Phiset) system, which comprises (usually elevated) high-capacity controlled-access highways serving the Greater Bangkok area and some nearby provinces. First opened to service in 1981, the system currently consists of seven completed sub-systems completed adding up to a total distance of 207.9 kilometres (129.2 mi).

The constituent expressway systems are (in order of completion):

1. Chaloem Maha Nakhon Expressway (First Stage Expressway System)
2. Si Rat Expressway (Second Stage Expressway System)
3. Chalong Rat Expressway (Ramindra – At Narong Expressway)
4. Burapha Withi Expressway (Bang Na Expressway)
5. Udon Ratthaya Expressway (Bang Pa-in – Pak Kret Expressway)
6. Third stage expressway System, S1 section (At Narong - Bang Na)
7. Bang Phli – Suk Sawat Expressway (South Kanchanaphisek ring road)
8. Ramindra – Outer Ring Road Expressway

See also

• Controlled-access highways in Thailand