Regional Cooperation and Integration (RCI)
Across Asia and the Pacific, ADB is working to promote cross-border infrastructure, trade integration, financial links, and regional public goods.
The Indonesia−Malaysia−Thailand Growth Triangle (IMT-GT) was established in 1993 to accelerate economic transformation by leveraging complementarities and comparative advantages. IMT-GT fosters area-based cooperation to boost growth in disadvantaged regions, including Malaysia and Thailand border areas and Sumatera Island in Indonesia, and ensure communities benefit from economic integration. It promotes private-sector led economic growth and focuses on eight strategic pillars: transport connectivity, trade facilitation, agriculture, halal products, human resource development, tourism, environment, and digital transformation.

The growth triangle contributes to ASEAN integration with a unique subnational (states and provinces) scope. IMT-GT covers 35 provinces and states: 10 in Sumatera, Indonesia; 11 in Malaysia; and 14 in southern Thailand.
IMT-GT Vision 2036 guides cooperation initiatives to create an integrated, innovative, inclusive, and sustainable subregion by 2036 through four 5-year implementation blueprints. The Implementation Blueprint (IB) 2022–2026 is the second medium-term strategic and action plan to realize IMT-GT’s vision.
ADB has been IMT-GT’s Regional Development Partner since 2006, supporting cooperation through multiple roles: financier, development partner, knowledge provider, capacity builder, and honest broker. ADB provides technical and strategic guidance, mobilizes resources, and strengthens institutional development. Technical assistance includes support for strategy development, including IMT-GT Roadmap 2007–2011, IB 2012–2016, IB 2017–2021 and IB 2022–2026, and progress assessment through a midterm review.
With ADB support, IMT-GT is developing six economic corridors to achieve Vision 2036’s three priority goals: (i) sustainable, innovative agriculture; (ii) competitive, advanced industry; and (iii) inclusive cross-border tourism.
ADB serves as secretariat or advisor for the following subregional programs.
The BIMP-EAGA initiative was launched in 1994 as a cooperation initiative to close the development gap across and within the EAGA member countries.
The CAREC Program is a partnership of 11 countries and development partners working together to promote development through cooperation, leading to accelerated economic growth and poverty reduction.
The GMS is a natural economic area bound together by the Mekong River, covering 2.6 million square kilometers and a combined population of around 326 million.
The SASEC Program brings together Bangladesh, Bhutan, India, the Maldives, Nepal, and Sri Lanka in a project-based partnership to build a better quality of life for the people of the subregion.

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