Effectiveness of Noise Barriers Installed Along MRT Tracks

Mr Melvin Yong Yik Chye asked the Minister for Transport (a) how effective are noise barriers installed along MRT tracks; (b) whether there are ongoing trials to explore ways to reduce the noise generated from MRT trains; and (c) if so, whether there have been any promising results thus far.

Since 2013, LTA has installed 21.5 kilometres of noise barriers along MRT viaducts, covering 45 locations. Works are ongoing to install a further 5.5 kilometres of noise barriers. These noise barriers have been effective in reducing train noise by five to 10 decibels (dBA), which is similar to halving of sound volume. In a recent Straits Times' article published on 18 July 2022, residents who live near train tracks shared that there was a perceptible reduction in noise from passing trains after the installation of the noise barriers.

Apart from noise barriers, LTA also works with the train operators and industry to further reduce train noise in other ways. Operators frequently monitor noise levels near residential buildings, and service train tracks and wheels to minimise noise generated. For above-ground rail lines, ballast and concrete sleepers are used to better absorb vibration and noise. LTA is also fitting noise-dampening wheels on new trains, such as those for the upcoming Jurong Region Line.