Case Study

Rapid Transit: Noise & Vibration Assessment (Singapore)

The Downtown MRT Line will be the fifth Mass Rapid Transit line in Singapore. It is scheduled for completion in 2016 and will incorporate 34 stations.

It is designed to serve half a million commuters each day and will be the longest underground, driverless MRT line in Singapore. Travelling from Upper Changi to Bukit Panjang will take about 65 minutes.


Expo Station (near the south of Changi Airport) to Bukit Panjang LRT, a total length of 46.4km


Land and Traffic Authority



Project Objectives:

SLR Consulting worked closely with the Land Transport Authority of Singapore and several independent design teams to identify the areas of potential noise and vibration impact. The commission commenced at the early design phase and extended to the detailing of mitigation measures for the final alignment.

The alignment passes under or very close to several noise and vibration sensitive buildings including; The Singapore National Museum, the Subordinate’s Court, live performance spaces, theatres, etc.

Our Role

SLR undertook the following works:

Design Development

  • Working with the Project Team to assess the noise and vibration impacts of design alternatives.
  • Provided advice to the authorities on international practices in vibration control options and criteria.

Operational Noise and Vibration

  • Prediction of airborne and ground-borne noise from the operation of trains in tunnels and from the maintenance depots for all buildings within 100 m of the rail corridor.
  • Identification of the need for and options available for vibration mitigation at key locations. Undertake a ‘reasonable and feasible’ evaluation and detail the final measures, after consultation with key stakeholders.