Bangkok Mass Transit Authority (Thai: องค์การขนส่งมวลชนกรุงเทพ pronounced [ʔoŋ kaːn kʰǒn sòŋ muːan tɕʰon kruŋ tʰêːp]), also known as BMTA (ขสมก.

The Bangkok Mass Transit Authority offers bus and van routes throughout the city and its suburban provinces.

The government, in 1975, addressed the crisis by setting up a public-private joint venture called the Metropolitan Transit Company, Limited (Thai: บริษัทมหานครขนส่ง จำกัด), but the effort failed to materialize.

[1]: 11 BMTA's poor financial performance has prompted the State Enterprise Policy Office (SEPO) to step in with a plan for "business rehabilitation".

"[3] The cash box plan was part of the agency's 1.6 billion baht automated bus fare collection project that also covers the installation of e-ticket reading machines on all 2,600 buses serving Bangkok routes.

The chairman originally stated that he expected workers would take up early retirement packages once all the buses were equipped with cashless card readers.

The air-conditioned bus fleet consists of buses from Hino, Isuzu, Daewoo, and Mercedes-Benz (standard and articulated).

The BMTA has been working for 11 years to procure 489 natural gas-powered buses to replace its ageing fleet and is expected to complete the task in 2018.