The 750V dc driverless trains will be the first in Singapore with five doors on each side of each vehicle. LTA says the fleet will also be equipped with improved current regeneration technology.

Kawasaki will design the trains, while CSR Qingdao Sifang will be responsible for producing the aluminium alloy bodyshells and final assembly of the vehicles. The trains will be delivered to Singapore between 2018 and 2021.

The 22-station Thomson Line will link Gardens by the Bay in central Singapore with Woodlands in the north of the island. The line will run underground for its entire 30km length. The first phase is due to open in 2019.

The Thomson Line will be operated as a single route with the 21km, 12-station Eastern Region Line (ERL) from Marina Bay to Changi.