The Transport System Office has the following authorities:
                 1.  Study, survey, design, direct and supervise construction of rail transportation as well as transportation junction.
                 2.  Study and specify Bangkok rail transportation service standard.
                 3.  Consider having private sector prepare sky walks connecting the sky train stations and buildings and park and ride places.
                 4.  Follow up, inspect, direct and supervise Bangkok rail transportation service to meet the contract and international standard for the safety of people and sky train users. Evaluate the service provider and concessionaire performance on following environmental impact mitigation both during construction and after opening for service.
                 5.  Study, survey, design and specify the road and water transportation system service standard.
                 6.  Direct, supervise construction and manage road and water transportation system.
                 7.  Study, analyze and plan Bangkok mass transit system for rail, road and water transportation.
                 8.  Study and analyze to specify different types of mass transit system as well as propose concept, process, investment method alternatives in constructing various transportation system.
                 9.  Study, analyze and specify the development plan for supplementary mass transit system to connect to the main mass transit system.
                 10. Study and analyze the feasibility in managing, developing, improving and modifying the road, rail and water transportation revenue to be sufficient for the operation. As well as to gain income by giving rights or employing or other any means of obtaining revenue which will not affect people’s convenience and safety in transportation.
                 11.  Manage earning by law, contract and related regulation specified.
                 12.  Other related or assigned duties.
Dividing into internal sections as follows:

                   The General Administration Section has the following authorities:
                              1.  Correspondence and general administration
                              2.  Human resources and disciplinary
                              3.  Budgeting, financing and accounting
                              4.  Supply work
                              5.  Public relations
                              6.  Planning
                              7.  Administration and coordination, conference, secretarial work
                              8.  Premises and vehicle supervision work
                              9.  Other related or assigned duties
                   The Rail Transport System Section has the following authorities:
                              1.  Study, survey, design, direct and supervise rail transportation construction.
                              2.  Study, design and supervise rail transportation junction construction.
                              3.  Consider having private sector prepare sky walks connecting the sky train stations and buildings as well as park and ride places.
                              4.  Study and specify Bangkok rail transportation service standard.
                              5.  Follow up, inspect, direct and supervise Bangkok rail transportation service to meet the contract and international standard for the safety of people and sky train users.
                              6.  Follow up, inspect and evaluate service provider and concessionaire performance from following environmental impact mitigation both during construction and after opening for service.
                              7.  Other related or assigned duties.
Which is divided into following offices:

                             The Rail System Project Office has the following authorities:
                                        1.  Study, survey and design Bangkok rail transportation system.
                                        2.  Direct and supervise rail construction such as sky train, subway, and their extension, light rail, monorail, tram and other rail system in Bangkok.
                                        3.  Study, design and supervise rail transportation junction such as sky walks and parks and ride places etc.
                                        4.  Consider having private sector prepare sky walks connecting the sky train stations and buildings as well as parks and ride places.
                                        5.  Other related or assigned duties.
                             The Rail System Management Office has the following authorities:
                                        1.  Study and specify Bangkok rail transportation service standard.
                                        2.  Follow up, inspect, direct and supervise Bangkok rail transportation service to meet the contract and international standard for the safety of people and sky train users.
                                        3.  Follow up, inspect and evaluate service provider and concessionaire performance from following environmental impact mitigation both during construction and after opening for service.
                                        4. 
Other related or assigned duties.

                   The Road and Water Transport System Section has the following authorities:
                              1. 
Study, survey, design and specify Bangkok road and water transportation service standard.
                              2.  Direct and supervise road transportation construction.
                              3.  Direct, supervise construction, and manage road and water transportation.
                              4.  Study, analyze and plan Bangkok mass transit system for rail, road and water transportation.
                              5.  Study, analyze and specify supplementary mass transit system alternatives.
                              6.  Study and propose concept, process and investment alternatives in constructing various transportation system.
                              7.  Study, analyze and specify the development plan for supplementary mass transit system to connect to the main mass transit system.
                              8.  Other related or assigned duties.
Which could be divided into:
                              The Network System Development Office has the following authorities:
                                        1.  Study, analyze and plan Bangkok mass transit system for rail, road and water transportation to connect into a transportation network in Bangkok.
                                        2.  Study, analyze and specify supplementary mass transit system alternatives.
                                        3.  Study and propose concept, process and investment alternatives in constructing various transportation system.
                                        4.  Study, analyze and specify the development plan for supplementary mass transit system to connect to the main mass transit system.
                                        5.  Other related or assigned duties.
                             The Road and Water Transport System Office has the following authorities:
                                        1.  Study, survey, design and specify Bangkok road and water transportation service standard.
                                        2.  Direct and supervise road transportation system construction such as bus, shuttle bus, bus rapid transit etc. so people could travel smoothly and safely.
                                        3.  Direct and supervise construction as well as manage water transportation such as navigation in Phasi Chareon canal and Phadung Krung Kasem canal etc.
                                        4.  Study, survey, design and supervise transportation facility construction such as pavilion for public transportation passengers, taxi parking spot, park and ride place etc. to facilitate the transportation in Bangkok.
                                        5.  Other related or assigned duties.
                  The Asset Management Section has the following authorities:
                              1.  Study and analyze the feasibility in managing, developing, improving and modifying the road, rail and water transportation revenue to be sufficient for the operation.
                              2.  Gain income by giving rights or employing or any other means of obtaining revenue which will not affect people’s transportation.
                              3.  Manage earnings following the law, contract and related regulation
                              4.  Other related or assigned duties.