(1) on single line class 'B' stations worked on absolute block system and equipped with manually operated multiple aspects signalling if obstructing of the line outside the outermost facing point in the direction of an approaching train is required for shunting purposes and is otherwise not prohibited by special instructions, an advanced starter shall be placed, at such distance away from the outer most facing point as may be required,
Provided the distance between the advanced starter and opposing first Stop signal (home) is not less than one hundred eighty meters,
Provided further that the distance between the outermost facing point and the advanced starter shall not be less than one hundred twenty meters; the location of such shunting limit board or advanced starter shall mark the limit of the block section.
(2) (a) on a double line class 'B' station worked on absolute block system equipped with multiple aspect colour light signalling and where either there are no points or the outer most points at the approaching end are trailing, a block section limit board shall be provided to mark the limit of station section. A block section limit board may also be provided where outermost point is a facing point, to facilitate creation of space for free zone or shunting.
180 THE GAZETTE OF INDIA : EXTRAORDINARY [PART II—SEC. 3(i)] It shall be placed at a distance of not less than one hundred eighty meters between the first stop (home) signal and the block section limit board in the direction of approach shall not be less than block overlap in advance of the home signal.
(b) on double line special class stations worked on automatic block system equipped with semi-automatic Home Stop signal, except when there are no points, a block section limit board shall be provided to meet similar requirements after switching over to manual mode and keeping it at 'ON'. In that case, distance between the home signal and the block section limit board in the direction of approach shall not be less than one hundred twenty meters.
(c) the block section limit board shall be provided at such distance away from the outer most point as may be required and must always protect the fouling mark of the outer most point.
(3) On double line class 'B' station worked on absolute block system of working and equipped with manually operated multiple aspects signalling if obstructing of the line outside the outermost point in the direction of departing train is required for shunting purposes and is otherwise not prohibited by special instructions, an advanced starter shall be provided and placed at such shunting distance away from the outer most point as may be required.
Provided the distance between the outermost point and the Advance Starter shall not be less than one hundred twenty meters. The location of advanced starter shall mark the beginning of block section.
(4) On class 'B' stations worked on absolute block system and equipped with manually operated multiple aspects signalling if there is a requirement to segregate limits of the block section and the station section in order to create a free zone between them to accommodate a level crossing gate, free zone limit board may be provided between outermost facing point and advanced starter on single line, or outermost point and block section limit board on double line. In such a case the distance between free zone limit board and the outer most point shall not be less than the signal overlap of starter signal one hundred twenty meters.
(5) Description of block section limit board or free zone limit board,- Either of the block section limit board and free zone limit board shall be a rectangular board painted yellow having black strips at the border and diagonals bearing words 'block section limit' or 'free zone limit' at the bottom on the side which faces the station as the case may be, and fitted with a lamp showing a white light in both directions to mark its position by night.
(6) On double line special class station worked on automatic block system of working equipped with multiple aspects signalling if obstructing of the line outside the outermost point in the direction of departing train is required for shunting purposes and is otherwise not prohibited by special instructions, or a modified semi-automatic Stop signal in midsection is to be provided, a semi-automatic advanced Starter shall be provided. It shall be placed at such distance away from the outer most point as may be required, provided the ¹Hkkx IIµ[k.M 3(i)º Hkkjr dk jkti=k % vlk/kj.k 181 distance between the outermost point and the advanced Starter shall not be less than one hundred twenty meters.
Provided obstruction outside the outermost point shall however be permitted only after the home signal and all other signals has been reverted to manual mode and kept at 'ON'.