Trains are now operating back as the Ampang Line and the Sri Petaling Line, with both lines plying the shared sector between Sentul Timur and Chan Sow Lin. There is no more need to change trains at Chan Sow Lin if you are travelling to and from the shared sector.
From 17 July 2016, passengers travelling from Sentul Timur to Ampang will need to change trains at Chan Sow Lin. This is for the new trains to run on CBTC on the existing line between Chan Sow Lin and Sentul Timur. Chan Sow Lin is already equipped with 3 tracks and 2 island platforms, which will make the transition seamless and the transfer hassle-free. The existing Adtranz trains will run on the Ampang Line between Chan Sow Lin and Ampang, whereas the new AMY trains will run on the Sri Petaling Line between Sentul Timur and Putra Heights. Refer to the attached transfer guides for Chan Sow Lin Interchange, effective 17 July 2016. To travel from Sentul Timur to Ampang and vice-versa: Click on the image to enlarge. To travel from Putra Heights to Ampang and vice-versa: Click on the image to enlarge. If you are travelling from Ampang: Click on the image to enlarge. Overview of platform assignments: Click on the image to enlarge. There are also ample signs and route maps at the platform to help your transfer. Now I know what you might be asking. Wah! How can this split in service be good for me? Now I have to change trains! Not exactly. Since more passengers travel on the Sri Petaling branch, only those travelling to and from Ampang will need to change trains. All trains from Sentul Timur now terminate at Putra Heights. Frequency across the whole line is also capable of being doubled. Let me explain. Assuming a headway of 2 minutes, if the line were to operate on the old method of sharing the line between Sentul Timur and Chan Sow Lin, the headway on both branch lines will be halved at 4 minutes as each train has to alternate from the main line. Assuming a headway of 2 minutes, if the line were to operate on the new method of running independent lines, the headway on the whole network will remain at 2 minutes as each train does not have to wait for another entering from a different line and sharing the same track. The whole network enjoys the higher 2 minute frequency, and capacity is doubled on the 2 branch lines. Transferring at Chan Sow Lin will now save you the confusion of where each train is heading to when boarding from stations between Sentul Timur and Chan Sow Lin, and will make for higher frequencies across the whole network. This is just a theoretical explanation by RailTravel Station and not representative of the frequency that RapidKL may run their trains at. Travelling on the Sri Petaling and Ampang Lines from 17 July 2016 onwards will be simpler and potentially faster. Remember to cross over to the middle platform for the train to Ampang!