CAG Report Highlights Noise Concerns in Lucknow Metro, Citing IIT Kanpur Study
The Comptroller and Auditor General (CAG) of India has raised significant concerns regarding noise pollution in the Lucknow Metro system. According to a recent audit, a study conducted by the Indian Institute of Technology (IIT) Kanpur found that noise levels both inside and outside the metro trains exceed internationally accepted standards, potentially compromising passenger comfort and acoustic safety.
International Guidelines and Measurement Methodology
To provide context, the report references guidelines issued by the Institute for Rapid Transit in Washington DC, established in 1973. These standards specify that sound levels in rapid transit systems should remain within the range of 65 to 75 decibels (dB) to ensure a comfortable environment for commuters. In order to assess compliance, IIT Kanpur researchers meticulously measured noise levels at a speed of 40 kilometers per hour across various sections of the metro network, including elevated and underground tracks.
Detailed Findings from the IIT Kanpur Study
While the overall sound intensity was not classified as extremely high, the results consistently indicated violations of these international norms. Inside the metro trains during static conditions at Munshipulia station, noise levels were recorded between 76.1 dB and 76.2 dB, which is notably above the recommended 65 dB threshold. In dynamic conditions, such as when the train was in motion between Munshipulia and KD Singh Babu Stadium, noise levels surged sharply to 83.4 dB, surpassing the upper limit of 75 dB.
Exterior tests conducted at seven different locations also revealed elevated noise values. Measurements taken under both static and dynamic conditions ranged from 81.7 dB to 82.4 dB, exceeding the acceptable range of 60 to 75 dB. At one specific site, stationary exterior noise reached 81.3 dB, which is above the benchmark of 67 dB. It is important to note that all tests were carried out during hours of minimal passenger movement, as requested by the Uttar Pradesh Metro Rail Corporation (UPMRC), to reduce potential interference and ensure accurate data collection.
Official Responses and Regulatory Context
In response to these findings, the UPMRC issued an official statement asserting that noise or sound levels were within acceptable limits. However, the CAG report challenges this claim, emphasizing that the audit found the Lucknow Metro failed to achieve its objective of maintaining comfortable noise levels inside trains and at stations. Furthermore, in September 2024, the state government argued that the Washington DC guidelines are not legally binding, highlighting that each transit system operates under its own regulatory framework.
Despite this argument, the CAG noted that while these international guidelines may not be mandatory, they serve as essential benchmarks for designing commuter-friendly transit systems. The audit underscores the importance of adhering to such standards to enhance passenger experience and ensure long-term acoustic safety in urban rail networks.
