ADB's $174.61 Billion Infrastructure Pipeline Signals New Growth Ambitions for Southeast Asia

The ADB proposes four interconnected economic corridors and a $174.61 billion infrastructure pipeline to strengthen trade, attract investment, create jobs, and boost inclusive growth across BIMP-EAGA. The report urges governments to improve cross-border regulations, strengthen regional cooperation, mobilize private investment, and ensure sustainable development reaches remote and underserved communities.

The Asian Development Bank (ADB), through its Southeast Asia Department and Regional Cooperation and Integration Unit, has called for a major transformation of economic development across Brunei Darussalam, Indonesia, Malaysia, and the Philippines. In its November 2026 policy brief, Unlocking Inclusive Growth: A Strategic, Spatial, and Socially Inclusive Approach to BIMP-EAGA Economic Corridor Development, authored by Pamela Asis-Layugan, the ADB warns that building roads, ports, and airports alone cannot deliver inclusive prosperity. Governments must combine infrastructure investments with industrial development, trade reforms, job creation, digital connectivity, and environmental protection to ensure economic opportunities reach remote and disadvantaged communities.

A $1.34 Trillion Economy Still Struggling with Regional Integration

Established in 1994, the Brunei Darussalam–Indonesia–Malaysia–Philippines East ASEAN Growth Area (BIMP-EAGA) aims to accelerate economic development in geographically isolated regions. Covering more than 60% of the participating countries' combined land area, the subregion accommodates approximately 82.68 million people, representing just 19.27% of their population.

Despite these challenges, BIMP-EAGA has developed into a $1.34 trillion economy, accounting for 18.03% of the four countries' combined economic output in 2024, measured at purchasing power parity. Regional trade reached $165.96 billion, comprising $109.20 billion in exports and $56.75 billion in imports.

However, economic integration remains weak. Trade between BIMP-EAGA territories amounted to just $5.41 billion in 2024, while commerce with markets outside the subregion dominated. The report highlights that improved transportation networks have not automatically translated into stronger regional supply chains, greater industrial activity, or widespread employment opportunities.

For traders and businesses, weak cross-border connections mean higher logistics costs, limited market access, and missed opportunities to participate in regional production networks. The ADB argues that infrastructure investments must be supported by better trade regulations, industrial facilities, workforce development, and stronger business cooperation.

Four Economic Corridors to Unlock Trade and Investment

To address these weaknesses, the ADB proposes restructuring the existing three economic corridors into four expanded and interconnected corridors covering 55 participating areas. These networks would link industrial zones, production centers, border crossings, ports, tourism destinations, and international markets.

The West Economic Corridor would connect Brunei Darussalam, parts of Indonesian Kalimantan, Malaysia's Sabah and Sarawak, and territories in the southern Philippines. It offers opportunities in renewable energy, manufacturing, logistics, tourism, oil and gas, and digital services.

The Central Economic Corridor would strengthen connections between Kalimantan, Malaysia, and parts of Mindanao, creating opportunities in logistics, clean energy, cross-border trade, and halal-certified products.

The North–South Economic Corridor would connect Mindanao and Sulawesi, supporting agriculture, fisheries, aquaculture, food processing, maritime trade, and coastal tourism. Environmental protection would be essential because the corridor includes sensitive marine ecosystems within the Coral Triangle.

Meanwhile, the newly proposed East Economic Corridor would extend economic opportunities into eastern Indonesia, particularly Maluku and Papua. Investments in fisheries, tourism, and market connectivity could create jobs and support economic diversification in some of the country's most remote territories.

$174.61 Billion Investment Pipeline Could Transform Regional Connectivity

The scale of planned infrastructure development is substantial. As of April 2026, BIMP-EAGA's priority infrastructure pipeline contained 265 projects requiring an estimated $174.61 billion, compared with 129 projects in October 2024. This represents an increase of approximately 105% in the number of projects.

Although transport still accounts for more than half the infrastructure portfolio, the ADB recommends expanding investment into agriculture, energy, telecommunications, environmental management, tourism, and manufacturing.

Trade reforms are equally important. Differences in customs procedures, immigration requirements, quarantine regulations, and border restrictions continue to increase business costs and delay shipments. Harmonized regulations, improved logistics facilities, and stronger cross-border cooperation could help traders move goods more efficiently and encourage smaller enterprises to enter regional markets.

The report also identifies opportunities in digital transformation, Islamic finance, renewable energy, sustainable fisheries, and changing international supply chains. Regional trade agreements could help businesses access larger markets, while climate-friendly industries could attract investment and create employment.

Stronger Governance and Inclusive Growth Will Determine Success

Despite the economic potential, weak institutional coordination remains a major challenge. The ADB recommends establishing a BIMP-EAGA Economic Corridors Task Force to coordinate investment planning, policy reforms, project implementation, and performance monitoring across participating countries.

Governments are encouraged to integrate corridor development into national and local investment plans while strengthening partnerships with businesses and development institutions. Public–private partnerships, blended financing, and investment-ready projects could help mobilize the capital needed for long-term development.

The report also stresses that economic growth must benefit disadvantaged communities. Rural roads, workforce training, digital inclusion, community-based tourism, and support for local enterprises could help connect remote populations with expanding economic opportunities.

Climate resilience and environmental sustainability must also become central to infrastructure and industrial planning, particularly in coastal and environmentally sensitive areas.

Under BIMP-EAGA Vision 2035, adopted in May 2026, the region aims to develop climate-smart agriculture, sustainable tourism, modern industries, and a skilled workforce. The ADB concludes that successful economic integration will depend not simply on building transport networks but on connecting infrastructure with businesses, workers, institutions, and markets. By combining investment, regulatory reforms, and social inclusion, BIMP-EAGA could strengthen regional competitiveness while ensuring that economic growth reaches communities previously left behind.