Set to support the testing of the Circle Line 6 trains and system, as well as mid life upgrades for trains, the facility is set to be fully operational by 2024.
A new integrated train testing centre, set to be built by 2022, will allow robust testing of new trains without disrupting the operational lines.
In light of Monday's NEL breakdown, the LTA said It will not use off-service hours on Sunday nights to try out new trains in case a fault occurs.
Transport Minister Khaw Boon Wan wrote in his blog that train testing could have been limited to the weekend, in response to Monday's NEL breakdown.
