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
5.13.5 Loco unit while entering into block section & after clearing the block section
(including the train length) shall inform so alongwith their TIN to concerned
Station/ IBS unit.
5.13.6 Both the station /IBS unit of a block section together shall ensure that there is
only one train with same TIN in the same block section. The off aspect &
movement authority to Loco unit for LSS shall be transmitted by Station/ IBS
unit only when LSS is off & concerned block section is clear of any train(s) of
the same TIN.
5.13.7 Arrangements shall be made in Station/ IBS unit for resetting the occupancy
of block section to clear status in case Loco unit of a train fails in the block
section & it is unable to communicate its clearance from block section at the
receiving Station/ IBS unit. The resetting arrangement shall have an electromechanical
6 digit non resettable counter to record such resetting and shall
be permitted only when the concerned block instruments are in Line Closed
condition. .
5.14 Prevention of Head on & Rear End Collisions
5.14.1 Loco units either directly or through Station unit, shall be capable of detecting
head on collisions, rear end collisions of trains/locos on single line, multiple
lines in all possible scenarios based on the track identification, speed of the
trains, location, traffic direction etc.
5.14.2 In case of head on collision situation, Loco units of both the trains shall
automatically apply brakes to bring the trains/locomotives to a stop short of
safe distance from each other.
5.14.3 In case of rear end collision situation, Loco unit of only rear train shall
automatically apply brakes to bring it to a stop short of safe distance from the
train ahead. There shall be no brake application in train ahead on account of
rear end collision situation.
5.14.4 As soon as the head-on collision or rear end collision, as the case may be,
situation is over, the application of brakes by Loco unit shall be withdrawn.
5.15 Detection of Parting/Jumbling
5.15.1 Loco unit through a potential free contact to be made available by the
railways, shall detect parting/ jumbling of the train and shall transmit ‘Train
Parted/ Jumbled’ message automatically.
5.15.2 Loco unit of trains approaching the parted/jumbled train, on getting the ‘Train
Parted/ Jumbled’ message, shall apply brakes to bring the train/locomotive to
a stop short of safe distance from parted/ jumbled train.
5.15.3 Loco unit shall have provision for material trains, ARTs and other similar trains
which are required to be parted for handling the work at site. In such case,
Loco unit shall not transmit ‘Train Parted/ Jumbled’ message.
5.15.4 Suitable arrangement to facilitate shunting in station section/block section
shall be provided.
5.16 SOS
5.16.1 Loco as well as Station unit shall have provision of sending SOS message by
pressing twin SOS buttons. SOS buttons shall be so placed that these could
not be pressed inadvertently. When the twin SOS buttons are pressed
simultaneously in Loco or Station units, the Loco units of all the trains/locos
within 3000m radius of SOS generating source as well as self-train (if SOS is
generated by Loco unit), shall automatically & without any time lag apply
emergency brakes so as to stop the train(s) even if reception of message is
not continued after receiving it once. SOS sending as well as receiving TCAS
equipments shall log sending & receiving of SOS message.
5.16.2 After the train stops due to reception of SOS, emergency brake shall be
released if the Loco Pilot presses the ‘Cancel’ push button. However, in such
condition, the Loco unit of the train shall impose a speed limit of 15 kmph. The
Signal Directorate RDSO/Lucknow Page 20 of 56