The 'Tamil Nadu Infrastructure Development (TNID) Act 2012' has established the "Tamil Nadu Infrastructure Development Board (TNIDB)."

Functions of TNIDB:

•  - Formulate sectoral policies
•  - Prepare shelf of projects and their prioritisation 
•  - Prepare Feasibility Study Reports and Detailed Project Reports
•  - Evaluate and Recommend Projects to the Government 
•  - Designate Implementing Agency 
•  - Prescribe the form of tender documents 
•  - Recommend financial support
•  - Approve Concession Agreements
•  - Rectify bottlenecks in the projects through policy initiatives
•  - Manage Project Preparation Fund, Tamil Nadu Infrastructure Development Fund etc.
•  - Coordinate with Government/Implementing Agencies
•  - Capacity building for Government departments and public agencies

The Government has established the Tamil Nadu Infrastructure Development Fund (TNIDF) to financially support the design, development, working, administration and management of projects.

The Government has also established the Project Preparation Fund (PPF) to conduct studies, hire experts / consultants, prepare feasibility studies, capacity building, undertake research and training etc.

The Secretariat of TNIDB is in the Infrastructure Cell under the Department of Finance, Government of Tamil Nadu. TNIDB has a competent team of experts working to fulfill its commitment towards growth of State Infrastructure.