Alstom will supply its Urbalis CBTC solution and equip metro trains with relevant equipment. The supplier will also upgrade the existing Automatic Train Supervision (ATS) system and almost double the stabling capacity of the Kim Chuan depot.

The extension to the line is scheduled to open in 2025 and will take its total length to 39.5km. The project will effectively close the loop by connecting Harbour Front station with Marina Bay, adding three new stations at Keppel, Cantonment and Prince Edward. The line will improve connectivity from the west of the island to the central business district as well as new developments taking shape around Marina Bay.