The Mumbai Rail Vikas Corporation (MRVC) is in the midst of experimenting with air suspension springs, which is an external compressor responsible for maintaining the balance and height of a train, for the two prototypes of its new rakes, which will be equipped with German-made Bombardier electrics.

While the accurate height — from the track to the overhead wire — of the trains has been achieved, MRVC is still struggling to attain the monitored balance of the rakes — empty or packed with commuters.