Section 36 in The Railways (Opening for Public Carriage of Passengers) Rules, 2000
36. Provision for isolation at stations.
(1)The speed of trains running through stations shall be governed by the General Rules for all open tines administered by the railway administrations, both Government and the non-Government railways and shall be subject also to the restrictions relating to standards of interlocking prescribed in the Signal Engineering Manual.(2)At no station at which isolation has not been provided through running trains shall be permitted unless the conditions laid down in the second paragraph of rule 4.11 of the General Rules are complied with.(3)At any station where mere is a speed restriction for through running trains different from neighbouring stations, a speed restriction board should be erected at the first approach signal or where no signals are provided, at full braking distance outside the first facing point.(4)In order to maintain safety for through running, points for trap sidings must not be inserted in the main tine or through tine, except under approved Special Instructions in accordance with the Signal Engineering Manual, Part I.(5)All passenger running tines shall be isolated from all goods lines or sidings connected thereto.(6)All goods running tines may be isolated from all sidings connected thereto.(7)It is not necessary to isolate one goods receiving line from another(8)Isolation may be accomplished by -(a)connection to another tine or long siding;(b)the provision of short dead end siding; or(c)the provision of trap.Note. -(i)Whichever may be the method for isolation, a starter signal shall be provided, except when omitted under approved special instructions.(ii)When a trap is provided, the trap switch should be located with the heel of the switch in rear of the fouling mark and preferably on the straight. The switch should be in the rail away from the line to be protected.(9)The various methods of isolation are illustrated in the diagrams given in Appendix A attached to these rules and the following instructions shall apply to their use in the case of running lines, namely :-Method A: This method shall apply to cases in which the line on which the train will run when me points are set for isolation of the through line, is kept clear for the adequate distance prescribed in Rule 3.40 of the Indian Railways (Open Lines) General Rules, 1976.Method B: When a short dead end siding is provided, it shall not ordinarily be long enough to permit of vehicles being stabled thereon. To obtain the adequate distance prescribed under rule 3.40 of the General Rules the points of the dead end siding shall be set for the cross over and against the siding, before a train is admitted on a line trapped by this method. Where it is necessary for the short dead end siding to be extended for the purpose of stabling vehicles, the above rule shall apply, unless a trap is provided on the dead end siding at a distance of not less than 180 metres (120 metres in case of stations provided with multi aspect signalling) from the starter signal where provided or from points leading to the main or through line. A train must be admitted on the running line unless the trap is set and locked against vehicles occupying the further part of the dead end siding.Method C: When a trap is used, a train must not be admitted on to the trapped line unless the trap has been closed, so that the train will not be derailed if the driver over shoots the trap.(10)When Method A cannot be used, and for any reason it is not convenient to use Method B or Method C and to provide adequate distance by setting the points of the short dead end siding or trap for the cross over and against the siding or trap, a sand hump of approved design should be used as a substitute for adequate distance as provided in rule 3.40(4) of the Indian Railways (Open Lines) General Rules, 1976. In that case the length of the siding should be at least one rail length and formation should be made up for a short distance beyond the hump.
