The Asian Development Bank has approved a USD 240 million loan to support the expansion of the Chennai Metro Rail network, reinforcing India’s push towards cleaner, safer and more reliable urban public transport in fast-growing metropolitan regions.

The financing will support key sections of Metro Lines 3, 4 and 5, covering around 20 km of elevated and underground corridors. The project also includes the construction of 18 new stations equipped with universal access features for women, senior citizens and persons with disabilities. In addition, disaster-resilient infrastructure will be incorporated to ensure passenger safety during extreme weather events.

The metro expansion aims to improve daily mobility while advancing Chennai’s low-carbon urban development goals. Inclusive design elements will enhance safety and accessibility for vulnerable users, while operational sustainability measures will focus on increasing non-fare revenues to support long-term financial viability. Climate-resilient engineering will help the network withstand increasingly frequent extreme weather conditions.

The project is expected to play a significant role in strengthening Chennai’s public transport system, reducing road congestion and lowering urban pollution levels. It also aligns with India’s broader climate action commitments by promoting sustainable and low-emission urban mobility. Improved metro connectivity is expected to support economic activity by enhancing access to jobs, education and essential services across the city.

ADB said it has been a long-term partner in India’s infrastructure development, particularly in urban transport, energy and climate-related projects. Mio Oka, ADB’s Country Director for India, said the Chennai Metro expansion would deliver safer, faster and more reliable daily travel while supporting low-carbon development.

The USD 240 million loan represents the second tranche under a larger USD 780 million multitranche financing facility for the Chennai Metro project.