Seven years ago when the new violet-white trains of Siemens make were introduced, rail authorities encountered a peculiar problem after two coaches separated during tests while the train was in motion. The trains are being used after rectifications. Now, the Mumbai Rail Vikas Corporation (MRVC), which is procuring new trains of Bombardier make, is also holding special tests on couplers (which join coaches), to verify if they are capable of keeping two coaches together at high speeds.

Testing again: Following the High Court order of raising the height of platforms to 900mm, trials of the new train had to be conducted again keeping this in mind. File pic