Page 589 - IRSEM_Main Book

S No Term Description/Meaning in SEM Relevant paras
7.1.18(e), 7.4.11, 7.6.1,
Means an arrangement, secured by the setting of points or other approved means, to protect
80 Isolation 13.1.11, 18.1.1(h),
the line so isolated from the danger of obstruction from other connected line or lines.
21.1.6.
7.1.12(a), 7.1.18 (d),
Last Stop Means the fixed Stop Signal of a station controlling the entry of trains into the next block
81 7.6.6(b), 12.5.4 (c),
Signal (LSS) section.
18.1.4(e), 21.1.6(m)
82 Level Crossing It is an intersection of road with railway track at the same level. 7.1.16, 12.8.1(a)
8.7.11, 9.2.1 (e),
Means any form of movable barrier, including a chain, capable of being closed across the
Level Crossing 13.3.1(b), 14.1.3,
83 road at the level crossing but does not include a wicket or a turnstile for the use of
Gate (LC Gate) 14.1.7, 14.1.8,
pedestrians.
14.1.10(a)
84 Life Cycle Series of identified stages through which all items go, from its conception to disposal. Annexure: G1 (1.1) (b)
The place beyond which the train has no information but to which the train is authorised to
Limit Of
85 run with a defined target speed higher than zero. The train is expected to receive new
Authority
information before passing the limit of authority.
The maximum number of trains that can be run on any given Line during a calendar day of 24 5.2.2 (c), 5.3.2 (b),
86 Line Capacity
hours. 14.1.2(b),
87 Line Clear Means the permission given from a block station to a block station in rear for a train to leave 7.5.2(b), 7.6.7, 18.1.2,
the latter and approach the former; or the permission obtained by a block station from a 18.1.5 (a)
block station in advance for a train to leave the former and proceed to next station in
advance.
Line It is a device consisting of a key actuated push button switch, which is placed close to 17.7.5(a),
88 Verification required track section (Usually a point zone or Line in station section) whose physical Annexure-18-A5(D)(iii)
Box (LV Box) clearance of any vehicles is to be verified at site.
3.1.3(b), 7.1.5(d),
Means the Loco Pilot/Assistant Loco Pilot/Shunter/Motor man or any other competent
89 Loco Pilot 7.1.15, 7.4.9, 12.21.1,
railway servant of the time being in charge of driving a train.
13.1.8, 19.2.1(b)
7.1.12(b), 12.5.12 (a),
90 Main Line Means the line ordinarily used for through running trains at a station and between stations.
12.21.3

Annexure: G4: Glossary of Technical Terms for Signal Engineering Manual Page 522 of 535