Criteria Used in Determining Location, Nature and Length of MRT Noise Barriers

5 Mr Leon Perera asked the Minister for Transport (a) what is the criteria used to determine the location, nature and length of MRT noise barriers; and (b) whether the Ministry will consider extending the noise barriers in areas that are close to residential units where current sound barriers do not extend to the whole residential area.

Mr Khaw Boon Wan: The Land Transport Authority (LTA) gives priority to the installation of noise barriers along elevated Mass Rapid Transit (MRT) tracks where the noise level in adjacent residential developments due to the MRT exceeds the National Environment Agency's (NEA) recommended threshold criterion of 67 decibels, averaged over an hour.