The Expressway Authority of Thailand (Thai: การทางพิเศษแห่งประเทศไทย) (EXAT) is a state enterprise under the Ministry of Transport.

[1] It was founded in 1972, and operates Thailand's expressway (ทางพิเศษ thang phiset) system, which refers to (usually elevated) high-capacity controlled-access highways serving the Greater Bangkok area and some nearby provinces.

EXAT does not operate the separate Thai motorway network, which covers intercity controlled-access highways.

[4] The constituent expressway systems are (in order of completion):[5] Fiscal year 2015 (year ending 30 September 2015) revenues were 16,060 million baht on total assets of 180,696 million baht.

[3]: 19  EXAT's top seven executives were remunerated 12.9 million baht total in FY2015.