There's a saying that you can't teach an old dog new tricks, but rail operator SMRT may just have shown train commuters otherwise with their first upgraded fifth-generation C151B train. For those who commute frequently on the MRT's North-South and East-West lines (NSEWL), the C151B is a familiar sight. Forty five of these fifth-generations trains have been in service since 2017.  The C151B rolling past Kallang MRT station. The fifth-generation rolling stock is used on both the North-South Line and East West Line. PHOTO: AsiaOne/Ong Chin Wee Along with 35 fourth-generation C151A and 12 sixth-generation C151C trains, all 92 trains will need to receive upgrades, typically carried out when trains reach around 15 years old. Specifically for the C151Bs, they are expected to be upgraded by mid-2030s. Read more