The Secretarial Division has the following authorities:
          1.  Correspondence and general administration
          2.  Assistive and secretarial work 
          3.  Human resource management
          4.  Financing and accounting
          5.  Budgeting
          6.  Supply
          7.  Conferencing and public relations 
          8.  Legal work, contract and legal development 
          9.  Premises, and vehicles work
         10. Other related or assigned duties
Dividing into internal division as follows:
           The Executive Assistant Section has the following authorities:
                    1.  Secretarial work for the director and deputy director of the office
                    2.  Arrange meeting by appointments
                    3.  Coordination and facilitation 
                    4.  Other related or assigned duties
            The General Administration Section has the following authorities:
                    1.  Correspondence and general administration 
                    2.  Administrative and coordination and conference work
                    3.  Public relations and information dissemination 
                    4.  Work follow through
                    5.  Building and vehicle control and administration
                    6.  Supervision over officials and other employees under the Secretarial Division
                    7.  Arranging the welfare and accommodation for officials and employees
                    8.  Supervising over annual medical check-up of officials and personnel under the Traffic and Transportation Department
                    9.  Grouping Traffic and Transportation Department officials and personnel to participate in various activities.
                   10. Other related or assigned duties
            The Human Resources Section has the following authorities:
                    1.  Manpower planning, recruitment, assigning to a post and accrediting as well as transferring, resignation and requesting to be back in government service
                    2.  Performance evaluation and promotion review
                    3.  Personnel development, higher education, seminars and training
                    4.  Bangkok Metropolitan Administration Subcommittee meeting
                    5.  Background registration
                    6.  Pension requesting and retirement
                    7.  Disciplinary proceedings
                    8.  Insignia and honor petition
                    9.  Officials and employee identification cards arrangement
                   10. Implementation of Social Security Act, B.E. 2533
                   11. Other related or assigned duties
            The Financial Section has the following authorities:
                     1.  Financial work
                     2.  Budgeting
                     3.  Accounting
                     4.  Supply
                     5.  Supreme inspection and payment voucher
                     6.  Procurement
                     7.  Asset registration
                     8.  Management Information System 2 (MIS 2) work
                     9.  Other related or assigned duties
            The Legal Affairs Section has the following authorities:
                     1.  Inspect, examine, develop extension or renewal of contract and amendment of contract.
                     2.  Inspect the matter and examine the notion.
                     3.  Give consultation, advice and answer queries on laws, orders, directions, regulations and Bangkok ordinance.
                     4.  Rule or oppose on legal provision and correct any mistake in laws, orders, directions and regulations.
                     5.  Adhere to the Act on Tortious Liability of Officials, B.E. 2542 (1999)
                     6.  Supervise civil, criminal and other related cases per court order or per public and other related sector orders.
                     7.  Inspect the inquiry from the investigating committee and liability of officers as a requisition in the event of violation.
                     8.  Perform other related or assigned duties.