Indian Railways Technical Terms Abbreviations Traffic, Safety & Signalling
|
S.No.
|
Abbreviation
|
Full Form
|
|
1
|
ABS
|
Automatic Block Signalling
|
|
2
|
ACD
|
Anti-Collision Device
|
|
3
|
AE
|
Automatic Emergency Brake
|
|
4
|
AFTC
|
Audio Frequency Track Circuit
|
|
5
|
ATC
|
Automatic Train Control
|
|
6
|
ATP
|
Automatic Train Protection
|
|
7
|
ATS
|
Automatic Train Stop
|
|
8
|
ATVM
|
Automatic Ticket Vending Machine
|
|
9
|
BPC
|
Brake Power Certificate
|
|
10
|
BS
|
Braking in Series
|
|
11
|
BSL
|
Block Section Limit
|
|
12
|
BSP
|
Braking in Series-Parallel
|
|
13
|
CDO
|
Coaching Depot
|
|
14
|
CLS
|
Colour Light Signalling
|
|
15
|
COCR
|
Confirmatory Oscillograph Car Run
|
|
16
|
COFC
|
Container on Flat Car
|
|
17
|
CTC
|
Centralized Traffic Control
|
|
18
|
DAC
|
Digital Axle Counter
|
|
19
|
DFC
|
Dedicated Freight Corridor
|
|
20
|
EI
|
Electronic Interlocking
|
|
21
|
FM
|
Fouling Mark
|
|
22
|
IBS
|
Intermediate Block Signalling
|
|
23
|
IPS
|
Integrated Power Supply
|
|
24
|
LC
|
Level Crossing
|
|
25
|
MACLS
|
Multiple Aspect Colour Light Signalling
|
|
26
|
MSDAC
|
Multi Section Digital Axle Counter
|
|
27
|
NI
|
Non-Interlocked
|
|
28
|
NX
|
Entrance-Exit Interlocking
|
|
29
|
OFC
|
Optical Fibre Cable
|
|
30
|
PI
|
Panel Interlocking
|
|
31
|
RRI
|
Route Relay Interlocking
|
|
32
|
RPC
|
Resistance Power Control
|
|
33
|
S&T
|
Signal and Telecommunication
|
|
34
|
SPAD
|
Signal Passed At Danger
|
|
35
|
SSDAC
|
Solid State Digital Axle Counter
|
|
36
|
SSI
|
Solid State Interlocking
|
|
37
|
STR
|
Station Technical Register
|
|
38
|
STRI
|
Stencil Type Route Indicator
|
|
39
|
SW
|
Semaphore Signal (Single Wire Type)
|
|
40
|
SWR
|
Station Working Rules / Short Welded Rail (Context
Dependent)
|
|
41
|
TALQ
|
Two Aspect Lower Quadrant Signal
|
|
42
|
TAWD
|
Train Actuated Warning Device
|
|
43
|
TC
|
Track Circuit
|
|
44
|
TMS
|
Train Management System
|
|
45
|
TPWS
|
Train Protection and Warning System
|
|
46
|
TRT
|
Traffic Recovery Time
|
|
47
|
UFSBI
|
Universal Fail Safe Block Interface
|
|
48
|
UWC
|
Unmanned Level Crossing (Historical)
|
|
49
|
VDU
|
Visual Display Unit
|
|
50
|
VHF
|
Very High Frequency Radio Communication
|
