Section 218(1) in The Dedicated Freight Corridor Railway General Rules, 2018
(1)Whenever an accident to train or track or any other obstruction prevents the use of one of the lines on a double line section temporarily, after ascertaining and, if need be, after verifying through visual inspection by a competent railway servant that the line is clear from all obstruction, the traffic, in consultation with Controller, may be worked on clear line as single line working under absolute block system on authority of written line clear ticket in form 2, or with personal permission of Director, Operation and Business Development, trains may follow each other even before the previous train has cleared the Block section on written authority in form 15, and in such a case,-(a)all signals irrespective of system of working, block instruments in case of absolute block system of working shall be suspended even for movement in the established direction. Likewise, semi automatic signals shall be put back to 'ON' aspect in manual mode.(b)(i)as a reminder of suspension of signals at either ends of the section where single line working is introduced and at all the intermediate stations signal buttons shall be covered with stop plugs, as also,(ii)as a reminder of suspension of block instruments, in case of Absolute Block System of working, the block instruments at either ends of the section where single line working is introduced and at all the intermediate stations shall be kept in train on line position and locked with keys kept in safe custody in Station through out the period of abnormal working; and-(iii)Buzzer alarm, if provided shall also be switched on as a reminder of abnormal working.(c)if there is an Intermediate Block Stop signal in case of Absolute Block System of working between the any two stations, the same shall be closed.
