Vertical noise barriers are constructed along straight railway tracks. Credit: Land Transport Authority

The Land Transport Authority (LTA) of Singapore has awarded PBT Engineering a contract to design and install 5.5km of railway noise barriers along north-south, east-west lines.

Under the contract, PBT Engineering will install railway noise barriers at 16 locations from Jurong East to Khatib stations on the north-south line (NSL) and Pasir Ris to Kembangan stations on the east-west line (EWL).

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The installation of the barriers will be complete by 2023 and are expected to decrease the noise levels by five to ten decibels, LTA noted.

The company will install two types of barriers based on the noise level and type of tracks.

At sections where the trains change tracks, a semi-enclosed ‘portal’ type of barriers will be installed while vertical barriers will be used for straight tracks.

On the NSL track, between Yio Chu Kang station and Ang Mo Kio station, the portal type of barrier will be erected.

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The installation of a portal noise barrier takes more time as larger columns need to be erected to support the structure.

The first phase of the programme was completed in 2018 and was built along 11.5km of track.

The works for the 10km-long second phase are underway and are expected to be completed by the third quarter of next year.

Last month, LTA awarded two civil contracts for the construction of five stations on the Jurong Region Line (JRL).

In April, LTA announced plans to build an Integrated Train Testing Centre (ITTC) to test the railway systems without disturbing usual Mass Rapid Transit (MRT) services.