The line was 6.5 kilometres (4.0 mi) long with four stations, and was operated by SMRT Corporation.

Travelling from one end of this line to the other end took about ten minutes, and the line was coloured brown and khaki on the rail map.

[1] The line used to terminate at the centre track at Jurong East (then platforms C/D, now D/E).

[2] On 7 January 1986, the Taiwanese RSEA International and Hock Lian Seng Joint Venture were awarded the contract for the Branch MRT line stations – Bukit Batok, Bukit Gombak, and Choa Chu Kang.

[3] The station codes for Bukit Batok to Choa Chu Kang stations were changed to N23, N22 and N21 respectively, subsequently to their current code on the North South line with the revamp of the system map on 31 July 2001.