Kindly check the attached picture. I have indicated the Ankai bypass line. This line is coming from opposite direction and entering Manmad. Hence to continue towards BSL, 100% reversal is required.
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If coming from DD-ANK-MMR, then straight line towards BSL. So no reversal.
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On...
more... the day of your travel, it might have taken the bypass line, hence it must have reversed. We are not saying that you are speaking lies. This scenario is very much possible. But this is not a regular route.