Form TA912 was issued to 13174 which is used for passing the train in automatic section after failure.Speed is limited to 25 kmph and manual signalling to be followed.LPs can disregard the red aspect and cross the signal in on position.But not more than one train should be passed in such section looks like due to some miscommunication freight train was also authorised to enter the section after a gap of 15 mins in the section.Appears to be the same case like in Vizag rear end crash.For more Automatic section rule can be seen.

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