The whole ADI TVC Train Group also have a lot of slack time between Valsad and Vasai Road............even The slow Valsad Bandra passenger Do not allow it to overtake and the whole ADI TVC group Remains Just behind the Valsad Bandra passenger In whole Vapi- Vasai Road section.....................
But it is done to make the train arrive at a proper time at the Destination, because if it is Speeded up then it would arrive at the destination in a Improper time......probabily at 2 or 3in Night