Tender invited for Development of Train Collision Avoidance System

ISO 9001: 2008 Effective from 18.06.2012 RDSO/SPN/196/2012 Version 3.1.1
Document Title : Specification of Train Collision Avoidance System
3.2.10 First Stop Signal (FSS) - It is the first stop signal on approach to a station/
IBS/ interlocked LC gate.
3.2.11 Functional Acceptance Tests: Tests carried out by installing some
equipments in the field to prove that the system performs in accordance with
this specification & the local configuration data is acceptable.
3.2.12 Interlocked LC Gate: An LC Gate interlocked with Signals. Such gates are
protected though signals provided on trackside.
3.2.13 Last Stop Signal: It is the last stop signal of a station/ IBS/ interlocked LC
gate while leaving the station/ IBS/ interlocked LC gate.
3.2.14 Level Crossing (LC):The intersection of road with railway track at the same
level.
3.2.15 Light Engine (LE): When the locomotive alone or consist of MU coupled
locomotives runs as a train, the train is called as Light Engine.
3.2.16 Locomotive: The word ‘locomotive’ wherever used in this specification shall
also mean the driving cab of EMU, MEMU, DEMU or any other self-propelled
vehicle running on Indian Railways.
3.2.17 Mid-Section: A location on track anywhere in the block section.
3.2.18 Movement Authority: The distance upto which the train is permitted to travel
without danger.
3.2.19 ‘Off’ aspect of a Signal: Any aspect other than ‘On’ aspect of a signal.
3.2.20 ‘On’ aspect of a Signal: It is the most restrictive aspect of the signal. In case
of stop signal, Red (or Danger) aspect is the ‘On’ aspect.
3.2.21 Overlap Distance: The length of track in advance of a stop signal, which
must be kept clear, either for clearing the stop signal next in rear or for the
purpose of granting permission to approach. The overlap distance may be
different for different types of signals & signalling.
3.2.22 Point:A railroad switch, turnout or points is a mechanical installation enabling
railway trains to be guided from one track to another. The position of the point
is said to be ‘Normal’ if it is set to straight track & ‘Reverse’ if it is set to
diversion.
3.2.23 Routine Tests:Tests carried out on the equipment/ system by the
manufacturer before offering for inspection.
3.2.24 Schedule of Dimensions (SOD): Indian Railways Schedule of Dimensions.
SOD can be purchased from IR.
3.2.25 Static speed profile: The Static Speed Profile (SSP) is a description of the
fixed speed restrictions for a part of track sent from track to train.
3.2.26 Station Section: It is that portion of station limits which can be used for
shunting even after granting Line clear to station in Rear.
3.2.27 Stop Signal: A railway signal whose ON aspect is ‘Danger’.
3.2.28 Traffic Direction: This is the direction of the train according to the traffic
movement as decided by the railway for a particular section e.g. Up or Dn
(down). This direction is used to determine head-on collision, Rear end
collision, approaching or moving away from a train or station etc.
3.2.29 Train Direction: This is the direction of the train as per Loco cab control e.g.
Forward or Reverse or Neutral. This direction is used for determining roll
back/ forward, reverse movement etc.
3.2.30 Type Tests: Tests carried out to prove conformity with the specification.
These are intended to prove the general qualities and design of the
equipment/ system.
Signal Directorate RDSO/Lucknow Page 11 of 56