The LRT Kelana Jaya Line is the fifth rail transit line and the first fully automated and driverless rail system in the Klang Valley area and forms a part of the Klang Valley Integrated Transit System. Servicing 37 stations, the line has 46.4 km of grade-separated tracks running mostly on underground and elevated guideways. Formerly known as the PUTRA LRT, it is currently operated by Rapid Rail, a subsidiary of Prasarana Malaysia. Construction began in 1994, about the same time as construction of the Ampang Line. The tunnels were constructed by Hazama Corporation and Hyundai E&C.[3] Operation commenced on 1 September 1998 between Subang Depot and Pasar Seni, with phase two, Pasar Seni to Terminal Putra, on 1 June 1999.[4]

In 2002, the line carried its 150 millionth passenger, with an average of 160,000 passengers daily.[5] Today, it carries over 250,000 passengers a day and over 350,000 a day during national events.[6]

The line underwent a 17 km extension with construction commencing in early 2010 through to 2016. With 13 new stations to the line, the new terminus is now at Putra Heights, extended from Kelana Jaya