Chennai Metro Rail (CMRL) has initiated essential repairs across its Phase I network to address increasing tunnel leakages. This decision follows incidents where minor seepages raised safety concerns, notably a case near Tondiarpet in December that resulted in sand and water entering a tunnel, leading to a train derailment. The incident underscored the need for proactive maintenance, prompting CMRL to conduct an assessment and implement corrective measures. A committee was formed to evaluate the issue, recommending immediate action to seal leaks, with findings submitted to the Commissioner of Rail Safety. The Chennai Metro Phase I network spans 45 kilometre, with approximately 55 per cent consisting of underground tunnels. Additionally, a section of the Phase I extension, covering around 9 kilometre, also runs underground. The focus on tunnel maintenance intensified after multiple seepage incidents, such as one near Sir Theagaraya College Metro, highlighting the need for early intervention to prevent safety hazards. To ensure passenger safety, CMRL has invited contractors to undertake the repair work. The plan involves sealing leaks using polyurethane injection resin grout, an effective waterproofing solution. The work will be carried out during off-peak hours, specifically at midnight and early morning, to minimise disruption to metro services. The repairs will extend across both Phase I and the extension network, targeting minor seepages to enhance structural integrity. Preventive maintenance is crucial to safeguarding passenger safety and maintaining the metro’s infrastructure. While current leakages are minor, addressing them promptly prevents larger issues from emerging. This proactive approach helps mitigate future risks and reinforces the importance of regular monitoring and upkeep of public infrastructure. The repair initiative also aligns with broader urban sustainability goals. As Chennai expands, maintaining critical transport infrastructure becomes vital for long-term efficiency and safety. Effective management of tunnel maintenance reduces resource consumption and prevents environmental degradation. Moreover, CMRL’s swift response demonstrates a commitment to civic responsibility, ensuring commuter confidence in the metro system. Urban transit systems require a balance between expansion and maintenance, and these efforts highlight the importance of sustainable infrastructure in a growing metropolis like Chennai. News source: Urban Acres