Train originating from tata, convinent to board and the deboard at Duvvada. Train 18189 TATA-ERS Express, and can save some pocket expense upto some extent. Then take 18519 VSKP-LTT Express to reach Secunderabad. Might take more time than 12703 but its the alternative to 12703 Falaknuma Express only if vacancy is...
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not available. Buffer time is enough and there wont be so much delay that you can miss the train. If 18189 is rescheduled by +1 hrs then might be possible to miss the train.