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R Y G Y
NRED
DOUBLEYELLOW
GREEN
Colour of lenses:-
APPROACH LIT ASPECTS
WWHITE
A Double Line represents the Normal Aspect of a signal where this needs to be shown.
01N 02N
03N
N 05
N 07
N 09
7
N 11
N 13a)
b)
15N
N 17
a) b)
N 19a)
b)
Y
Y
N 21
7
04N
06N
N 08
N 10
7
N 12
N 14
16
N 18
N 20
b)a)
Aspect, Capable of Flashing,eg.:- Double Yellow.
Mult i-unit, Two Aspect, R:G.
Multi-unit, Three Aspect, R:Y:G.
Posit ion Light, associated witha Main Aspect, Beneath MainAspect, Normally "OUT".
Multi-unit, Three Aspect, R:Y:G,Posit ion Light, AlphanumericStandard Route Indicatorsuspended, alternativeorientation shown.
Light Signal, Single UnitSearchlight, Three Aspect,R:Y:G.
Marker Lights:a) Stop Signal,b) Distant Signal.
Example of Aspect Posit ioningand Splitt ing Distant Signals.Lower Speed Diverging MainRoute to Left. Aspects of equalheight for equal speed routes.
Ground Posit ion Light a) AspectRW:WW, b) F ibre Opt ic RR:WWNormally "ON", indicated byjoining bar. Can be elevated.
Ground Posit ion Light Signal,a) Aspect YW:WW, b) FibreOpt ic YY:WW, Normal ly "ON",eg.:- shown elevated.
Ground Posit ion Light Signal,with separately posit ionedalphanumeric miniatureindicator.
Limit of Shunt,a) Posit ion Light, AspectsDouble Red, b) Indicator.All can be elevated.
Ground Posit ion Light,Aspect, Normally "OFF".Can be elevated.
Shunting, Set Back White Signals,Normal ly "OUT", W when "OFF".
Colour Light Signal,Temporari ly Not in Use
Light Signal, Single UnitSearchlight, Four Aspect,R:Y:YY:G.
Multi-unit, Four Aspect, R:Y:YY:G,Posit ion Light, Standard RouteIndicators; mounted at Groundlevel, eg.:- Co-acting Signal
Posit ion Light, associated witha Main Aspect, Offset,Normal ly "OUT".
Multi-unit, Four Aspect,R:Y:YY:G.
Mult i-unit, Two Aspect, Y:G.
Aspect, Not Used.eg.:- Green.
Symbol Terminology SymbolTerminology
Colour Light Signals
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Y
08
04
06
10
02
12
14
16
18
20
22
24
26
25
23
N
N
N
N
N
N
N
Semaphore Signals
Signals; Relationship to track
Terminology
Straight Post, Colour Light Signal,Left of Track for direction ofrunning to which it applies.eg.:-
Light Signals, Suspendedfrom Gantry.eg.:-
Symbol
#
C
#
21
19
17
15
13
11
09
07
05
03
01N
N
N
N
N
N
N
N
Terminology
Stop Signal, Generic symbolwhere no further informationneed be conveyed.
Stop Signal, Power Operated(all types).
Stop Signal, Fixed.
Reflectorised Stop Board.# supplementary legend to beshown.
Subsidiary Signal, Letter ifdisplayed:-"C" = Call On,"S" = Shunt Ahead.
Special Note, # symbol to beposit ioned adjacent to arm andrequires reference note.
Signal, Intensified Light.
Block Section Limit Signal.For use on l ines withoutLineside signals. Arrow Pointsto applicable l ine. (TVM Marker)
Shunting Signal, Single, RedArm, Normally "ON", Can beshown elevated.
Shunting Signal, Floodlit.
Shunting Signals, Mult iple,eg.:- Three Arms, bottomsignal shown Normally "OFF".
Symbol
N
N
N
N
N
Terminology
Distant Signal, Generic symbolwhere no further informationneed be conveyed.
Distant Signal, Power Operated(all types)
Distant Signal, Fixed.
Reflectorised Distant Board.
Semaphore Signal,Temporari ly Not in Use.
Example of Arm Stepping andSplitt ing Distant Signals, eg.:-Lower Speed Diverging MainRoute to Left. Arms of equalheight for equal speed routes.
Signal, Electr ic Lamp.
Miniature Arm, Offset.
Shunting Signal, YellowArm, Normally "ON", can beshown elevated.
Shunting Signal, PowerOperated.
Tall Siding Signals, MiniatureArms, eg.:- Three Arms, bottomsignal shown Normally "OFF".
Symbol
Straight Post, Semaphore Signal,Right of Track for direction ofrunning to which it applies.eg.:-
Light Signals, Mounted[above] Gantry.eg.:-
Terminology Symbol
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01
03
05
07
09
11
13
15
17 18
16
14
12
10
08
06
04
02
R#
A#
X
X#
LR
ASR
AR
SR
L
a) b)
Terminology Symbol SymbolTerminology
Semaphore, Stop Signal,slotted from another box.
Backslot, Slot operated bySemaphore Stop Signal Ahead,slot between "stop" & "distant"arm on same post not to beshown.
Semaphore, Distant Signal,slotted from another box.
Slots, Multiple, add oneaddit ional arm for each control,eg.:- Stop Signal. Numberingto be clearly identifiedenclosed in a symbol (but nota square or rectangle).
Slots, Main Colour LightSignal & associated Posit ionLight Signal.
Slot,a) Semaphore Shunting Signalb) Ground Posit ion Light Signal.
Slots
Terminology Terminology SymbolSymbol
Controls [# panel facil i t ies may be shown in Signal Route Tables]
Signal, the lever of which isElectrical ly Locked (mechanicalor colour l ight).
Signal, the lever of which isReleased by the "Block" at"Line Clear" (mechanical orcolour l ight).
Signal, the lever of which isReleased by Token(mechanical or colour l ight).
Signal, the lever of which isReleased by Key(mechanical or colour l ight).
Automatic Signal, havingReplacement faci l i t ies fromthe Signal Box.
Signal, Last WheelReplacement Facil i t ies (shown inSignal Route Tables only).
Control led Signal, AutoWorking Faci l i ty provided.
Signal, Controlled by LevelCrossing Gate Box butSupervised by Main SB.
Repeating [any combination at a signal as required]
Terminology Terminology SymbolSymbol
Arm or Aspect, ElectricallyIndicated in SB. +
Slot, Electrically Indicated inSB. +
Banner Repeater,a) Normally "ON"b) Normally "OFF".
Light, Electrically Indicated inSB. +
Arm or Aspect and Slot ON,Slot OFF, ElectricallyIndicated in SB. +
Banner Repeater, Splitt ing,eg.:- Lower Speed DivergingMain Route to the Left.
N 19 N 20
a) b)
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Carriage Depot Indicator, #supplementary legend.
N 11
Driver's Level Crossing Indicator,[DC]:- a) aspects R:W Flashingb) W Flashing only.
Loading / Unloading Indicators, N
08
N 07
Alphanumeric Indicator, canindicate:- [TT] Tripcock Test /[OFF] Off / [BT] Brake Test /[BU] Barriers Up / [RA] RightAway / [CD] Close Doors.
Alphanumeric Miniature Indicator,Double Sided.
N 05 N 06
Alphanumeric Miniature RouteIndicator, eg.:- associated withposition l ight signal routes.
Alphanumeric Standard RouteIndicator, eg.:- alternativeposit ion, avoiding confl iction withMiniature Indicators for "CD" -Close Door & "RA" - Right Away.
04N03N
Alphanumeric Standard RouteIndicator, Numeral indicates thenumber of route indicators.
Junction Indicator, showing allpossible diverging routeindicators and their numbering.
N 02N 01
Signal Control Limits; Aspect Plans
Terminology Terminology SymbolSymbol
Signal Passed At Danger,Indicator [SPAD].
Points Indicator. N 10N 09
Indicators[Alphanumeric Standard Indicator drawn Square / Miniature Indicator drawn half size and Rectangular]
Show relative posit ion of indicators to signal.Route characters, signal class and descriptions to be shown in Signal Route Tables.
7
77R
AC
D
TT
b)a)
S
#
1
GYY
Y
R + o/L
GYY
Y
R + o/L
GYY
Y
R + o/L
GYY
Y
R + o/L
GYYY
R + o/L
#1
#6PLS + 'SG' ( MI )
G + Pos 4( JI )YY + Pos 4( JI )
Y + Pos 4( JI )
G + Pos 5( JI )YY + Pos 5( JI )
Y + Pos 5( JI )
#3
#2
#4
FYFYYG
BRANCH
S L O W
FAST
12SDG
#1 Approach control condit ions for route to Siding#2 Approach control condit ions for route to Slow#3 Approach control condit ions for route to Slow#4 Approach control condit ions for route to Branch#5 Only relevant points & track numbers to be shown#6 PLS = Posit ion l ight
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a) Termination of Cab Signall ingb)Commencement of CabSignall ing.
Commencement of SpecialWorking (SIMBIDS).
Commencement of Gap.
Termination of SpecialWorking (SIMBIDS).
Termination of Gap.
Cancell ing Indicator.
N 04
N 02
N 06N 05
N 01
N 03
Terminology Terminology SymbolSymbol
Automat ic Warning System [AWS]
Terminology Terminology SymbolSymbol
Signall ing Signs
AW
SA
WS
CA
Ba)
CA
Bb)
National Radio Network [NRN],reflectorised, Radio ChannelChange Board, 047 numberindicates channel.
Notice Board, Internally Lit,# supplementary legend to beshown.
Radio Electronic Token Block,Station Limits / Loop ClearMarker Board, reflectorised.
Driver Only Operation [DOO],reflectorised, Radio ChannelChange Board 69, numberindicates channel.
Notice Board, Flood Lit,# supplementary legend to beshown
Notice Board, Reflectorised,# supplementary legend to beshown.
N 08
N 10
N 12N 11
N 09
N 07
Whist le Board. Remote Ground FrameMarker Board.
N 14N 13
Advanced Warning Board forAOCL / ABCL / OC LevelCrossings, Reflectorised.
16N 15
##
#
NRN047
D O O69
w
Combined White "Diamond"and "T".
Combined White "Diamond"and "X".
N 20N 19
White "Diamond". Telephone Sign. + N 18N 17
Terminology Terminology SymbolSymbol
Signall ing Post
Intermediate Block HomeSignal.
N 23
Semi-automatic Signal. Automatic Signal. N 22N 21
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Temporary Speed Indicators,Differential Speed. Internallylit.
Temporary Speed WarningBoard, Differential Speeds.Internally lit
Temporary Speed RepeatingWarning Board. Reflectorised.
Permissible Speed Restrict ionSign, Standard Differentialspeeds.
Permissible Speed Sign,Non-standard Differential speeds.
Permissible Speed WarningIndicator, Non-standardDifferential speeds.
Temporary Speed Indicator,directional arrows as required.Internally lit.
Emergency Speed WarningIndicator.
Temporary Speed WarningBoard, directional arrow asrequired. Internally lit.
Permissible Speed WarningIndicator, Standard Differentialspeeds.
Permissible Speed Sign,Directional arrow as required toindicate divergence speed.
Permissible Speed WarningIndicator, Directional arrowas required.
Terminology Terminology SymbolSymbol
Speed, # = Speed
N 04
N 02
N 06
N 08
N 10
N 12N 11
N 09
N 07
N 05
N 01
N 03
Temporary Speed Restr ict ionTermination Indicator.Internally lit.
Spate Indication.Internally lit.
N 14N 13
Combined Whist le Board /Speed Restriction.
Automatic Level Crossing,Speed Restrict ion Board,Differential Speeds.
N 16N 15
Signal Countdown Markers. 19N 18
Automatic Level Crossing,a) Right Direction Board,b) Wrong Direct ion Board (AHBC only).
Signal Countdown Signs. N 18N
#
#/#
# #
## #
#/#
# # #
R
# ##
#w #X
#
17
X# #
X
b)a)
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Trap Points, Wide to Gauge.
Double Slip.
Trap Points,Single Switch.
Movable Switch Diamond.
Slotted Joint, arrow indicatesdirection of control.
Hand Worked Points, Ordinary,[2 way spring], trailable.
Derailer, arrow indicatesdirection of derailment.
Swing Nose Crossing.
Trap Points,Double Switch.
Single Slip.
Fixed Diamond Crossing.
Hand Points, One Way Spring,eg. Catch Points.
Lie of Points, set for straightroute, showing normal posit ion.
Terminology Terminology SymbolSymbol
Point Layouts
N 04
N 02
N 06
N 08
N 10
N 12
14N 13
N 11
N 09
N 07
N 05
N 01
N 03s SJ
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Clamp Lock, + . # LeverNumber and Identif ication Letter.
Points with lock without bar,1 lever.
Point Machine, Power, al l types +eg. shown on left side of track.# Lever Number andIdentification Letter.
Points with lock and bar,2 levers.
Terminology Terminology SymbolSymbol
Control Types
1009
Special Note, * symbol to beposit ioned adjacent to pointsand requires reference note.Can be used for Split Detectionor Extra Backdrives.
Yard points, Power Operated,trailable, +.
1211
Points Clipped and Padlocked"Out Of Use" in accordancewith rule book appendix.
Point Heating,GPH = Gas +,EPH = Electric +.
08
N 13
16Point Crank (CH) /PumpHandle (PH), for manual pointoperation, eg Pump Handle.
14
Points, Worked From Signal Box,function normal sets points forstraight route. # Lever Numberand Identif ication Letter.
Hydro-Pneumatic Self RestoringPoints, Train Operated.# Identif ication Number.
N 02
Detection of Mechanical Points,Mechanical Detection shownin Table. Electrical Detectionshown ED + . # Lever Numberand Identif ication Letter.
Points, Worked by GroundFrame, Ground Panel or ShuntingFrame, al l released from acontrol l ing Signal Box. Numberenclosed in a symbol (but not asquare or rectangle).
04N 03
Point Machine, Dual Control.Points with Facing Point Lock,2 Levers, # Lever Numbers andIdentification Letters.
07
15N
06
N 01
#
05
31 32
3 # ED
#
#
#FPL
#
*
C & P
PH
#
30
EPH
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Miscellaneous
Terminology Terminology SymbolSymbol
Scotch Block.Buffer Stop, with:-a) No Light,b) White Light,c) Red Light.
N 10N 09
Kilometre Post.Mile Post, also Quarter, Halfand Threequarter Posts.
N 08N 07
Gradient Posts for unit r iseor fal l in % terms.
Pull Wires. # Length to beshown.
06
N 05
Gradient Posts, lengths for unitrise or fall, eg.:- fall ing 1 in 100;Level; Rising 1 in 1000.
Track and Directional Arrows,Bi-directional with predominantdirect ion of movement.
NN 03
Track and Directional Arrows,Bi-directional.
Track Normal Direct ionArrow, and Line Name.
N 02N 01
Sand Hump, # length to beshown.
Sand Drag, # length to beshown,a) with Buffer Stop,b) without Buffer Stop.
N 12N 11
Track Circuits
Terminology Terminology SymbolSymbol
Track Circuit on left, none onright.
Insulating Rail Joint [IRJ],Track Circuits in both directions.
1413
Track Circuit Portion, anexample of identif icationlettering.
Track Circuit on right, none on left. 1615
Stainless Steel Welded Strip,# length to be shown.
a) Short Track Circuit Sectionorb) Gap, # state length.
18
17Strike in Point.Track Circuit Interrupter, INT R
to be shown where interrupterrelay is repeated separatelyfrom Track Circuit.
2019
Critical Clearance Point identif iedas Fouling Point, Joint B atFouling Point plus crit icalmeasurement.
Clearance Point Joint A foul,Joint B clear. 2221
Impedance Bond, InternalTuning.
Impedance Bond, ExternalTuning.
2423
UP FAST
UP FAST
UP & DOWN FAST
04
L L
1001000
L L
1 %.1
%P#
¼ ½ ¾
a) b) c)
#
a)
#
b)
#
AA AB
AB AA
AA
AB AC
#
S I P
FP6ft+
B+16 ft (min)
CP
B
INT R
A
#a)
b) #
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Overlap IRJ
Terminology Terminology SymbolSymbol
Overlap, Bi-directional Line,common for Opposing Signals,eg.:- Dimensioned and withSignal Numbers. Length to beshown #.
Overlap, Bi-directional Line,common for Opposing Signals,add signal numbers i f confusing.
0807
Reduced and Ful l Length, Phantom,effective length to be shown, #.
06
Reduced and Full Length for Warning Aspect,length to be shown, #.
05
Non Standard Length, lengthto be shown, #.
Where applicable to severalsignals and identif ication isrequired.
04
03
Overlap for signal to theright.
Overlap for Signal on Left, alsosingle overlap on bi-directionall ine, Standard Length.
0201
Type Identif ication (where required)
Terminology Terminology SymbolSymbol
Alternating Current [AC],# for frequency.
General Track CircuitSymbol .
1009
DC HVI.DC Diode. 1211
Other Train Detectors
Terminology Terminology SymbolSymbol
Axle Counter Section.Axle Counter, arrow indicateseffective direction of operationif not bi-directional.
2019
Treadle, Operat ional One Way,Contacts Normally Closed,eg. Treadles on both rails.
Treadle, Independent Contacts,Operat ional Both Ways.
2423
Treadle, Contacts NormallyClosed.
Treadle, Contacts NormallyOpen.
2221
AA AB AA AB
W N 2W N 3
#
ROL #
# POL #
#W N 1
#
W 6 0W 6 2
AB
AB ( D )
AB( #Hz )
AB( HVI )
Frequency, Centre Fed,where # = frequency or channelin Hz.
Frequency, Aster / Reed ,where # = frequency or channelin Hz.
1413
FS2600,where (1) = frequency.
T121,where (A) = frequency.
1615
a) TC AID D [detects indirection of arrow only]b) TC AID N [detects bothways.
Overlay Track Circuit. 1817
AB ( f # )
AB ( A )
AB1 ( f # ) AB2
AB ( 1 )
AB AB
a) b)
AA (X)
RPOL
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Other Train Detectors (continued)
Terminology Terminology SymbolSymbol
AWS, Effect ive for movementin direction shown, Suppressedfor opposing moves.
AWS, Depot Test Inductor. N 10N 09
AWS, Permanent & Electro--magnet, where signal candisplay a green aspect, effectivefor direction of l ine only.
Automatic Warning Stystem,Permanent Magnet Only.
N 08N 07
Tip Cock Tester.Train Stop. N 06N 05
Detonator Placer,a) single shot ON,b) Single shot OFF,c) double Shot ON,d) double shot OFF.
0403
Hot Axle Box Detector.Depression Bars, Electrical,a) Independent,b) Working With TC.
0201
Aids for Drivers
Terminology Terminology SymbolSymbol
AWS, Selected suppression fornormal direction of traffic, eg.:-unfitted to f itted routes & SPAD.
AWS, # = Non standard distance. N 12N 11
Portable AWS.AWS, one instal lat ion on Bi-directional l ine, Effective in bothdirections, non standard distances,# = signal number(s) i f requiredand distance.
N 14N 13
Track-Train Data Transmitter,Infi l l transmission l imits.
Track-Train Data Transmitter. 1615
Electrif ication
Terminology Terminology SymbolSymbol
Automatic Power ControlMagnets (APC).
Neutral Section, l imits ofrestricted area for signalposit ioning.
1817
Staff Protection
Terminology Terminology SymbolSymbol
Lockout System l imits ofprotection. If protection is notcomplete, notes to cover.
Train Act ivated Warning System.Limits of Protection.
2019
a) b)
TE
a) b) c) d)
N
P
TEST
#
##
APC
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Addit ional information where required on Signall ing Location Plans
Terminology Terminology SymbolSymbol
Frequency Track Circuit,Tx = transmitter,Rx = receiver.
AC Track Circuit,# = frequency.
1009
DC Track Circuit, Feed endrelay.
Generic Track Circuit,F = feed,R = relay.
0807
Cable Pit and Under trackCrossing [UTX].# = number of ducts.
Cable Bridge or Gantry. 0605
Cable Routes.Area Covered by a SignalBox, Limit.
0403
Area Covered by anInterlocking, to edges ofplan if possible.
Area Covered by Location Caseor Relocatable EquipmentBuilding, dotted l ine surroundsequipment area on all l ines.
0201
Surface Concrete Troughing [SCT]; Buried Concrete Troughing [BCT]; Buried Direct [BD];On Brackets [BKS]; Platform Tube Route [PTR]; Buried Tube [BT]
Terminology Terminology SymbolSymbol
Axle Counter Section.Frequency Track Circuit,Centre Fed.
1211
Location Case,# = number of cases, = equipment side.
Power Lines crossing rai lway. 1413
[SCT]LIMIT OFTC IND.TO(DN.MAIN)
TRACK TRACKP
#
ABF R
ABR/F R
AB(#Hz)F x R x
AB( F#)T x R x
AB1R x
AB2R x
Tx
AA (X)
TRACK
XXXX
( or )#
#
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Terminology Terminology SymbolSymbol
No-Signalman TokenInstrument. Arrow indicatessection.
Electric Token Instrument,K = Key, S = Staff,T = Tablet, MS = MiniatureStaff. Configuration to be shown.'A' = Configuration.
N 10N 09
Block Switch,a) Plain,b) With Control.
Block Instruments, Combined,Control led, Bell , WelwynControl.
0807
Block Instrument, Absolute,Non-Peg, Control led.
Block Instrument, Absolute, Peg,Control led, # add WELWYNCONTROL adjacent i f appl icable.
0605
Block Instrument, Absolute,Non-Peg, Uncontrol led.
Block Instrument, Absolute,Peg, Uncontrolled.
0403
Block Instrument, Permissive,Non-Peg.
Block Instrument, Permissive,Peg.
0201
Key Release Instrument. 10N 11
Switch Lock and Indicator(track).
Occupation Key Instrument. 1413
K = Klaxon; H = Horn;S = Siren; Y = Yodalarm.Single and Double Sided.
Bell / Gong,a) Trembler,b) Single Stroke Bell / Gong.
N 16N 15
Telephone Plug Point.Telephone, +a) Direct to Signalman,b) Other, (E indicateselectrif ication telephone),# = function of telephone.
18N 17
Public / Occupation /Accommodation Level Crossing,Block Indicator.
Telephone, +Two Way Ringing,# = function of telephone.
20N 19
PLUNGER OR SWITCH; (one symbol per switch or plunger)Indications to Driver;BT = Brake Test,CC = Crossing Clear,CD = Close Door,ES = Emergency Stop,RA = Right Away.
Indications to Signalman;CDI = Carriage Depot Indicator,SR = Shunters Release,TA = Train Arrived,TRTS = Train Ready To Start.
Staff Protection control;LT = Lockout,TAWS = Train Act ivated Warning System,Other; to be defined on drawing.
N 21
+
+#
#
++
' A '
K NST
K
K
a) b)
a) b)
# #E
2#
+
+
a) b)
Y YY
+
CD
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Gated
Terminology Terminology SymbolSymbol
a) Spring Gates,b) Wickets,c) Cages,d) Control for above, add Cto gate.
08
Gates, Sympathetic [4],Interlocked with signall ing,worked from SB, add notereferring to type of operation.
Gate, Non Sympathetic [2],Interlocked with signall ing.Add note referring to type ofoperation.
0706
Manned Gate Operation ControlL = Lever, W = Wheel,P = Power Operated,B = Blacks Locks,E = Electric Locks,K = Key Locks.
Gate, Interlocked, workedfrom Box. # Posit ion ofWicket, Spring Gate or Cageas required.
0504
Gate, Interlocked, Workedfrom ground.
Gate, Uncontrol led, Worked fromground, normal posit ion of gatesolid, swing and directiondotted, opening away fromrailway, add K if lock provided.
N 0302
General
Terminology Terminology SymbolSymbol
Generic Level Crossing, # = Type.ABCL = Automatic Barrier Crossing Locally Monitored,AHBC = Automatic Half Barrier Crossing,AOCL = Automatic Open Crossing Locally Monitored,BC = Barrow Crossing,CCTV = Closed Circuit TV Crossing,MCB = Manually Controlled Barrier,MG = Manned Gates,MSL(MWL) = Miniature Stop Warning Lights,OC = Open Crossing,RBC = Remote Barrier Crossing,TOB = Traincrew Operated Barriers,TOG = Traincrew Operated Gates,UWB = User Worked Barriers,UWG = User Worked Gates.
N 01
#
RAILWAY
ROAD
K
eg :MG (W)
#
a) B) c) d)
c
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Miscellaneous
Terminology Terminology SymbolSymbol
Give Way Sign,(open crossing).
St Andrews Cross Sign,(OC & AOCL)
10N 09
Road Traff ic Lights,(RTL).
Miniature Stop (Warning) Lights(Vehicular).
N 07
Barrow Crossing Lights,(white only).
Miniature Stop (Warning) Lights(Pedestrian).
N 06
Posit ion of Local ControlUnit.
Full Barrier, controlled from SB,eg. using two barriers, applicableto MCB & CCTV.
04N 03
Full Barrier, controlled by otherthan SB, eg. Single barrier,appl icable to TOB, RBC &UWB.
Half Barrier, not workedfrom SB. Applicable toAHBC & ABCL.
N 02N 01
Closed Circuit TelevisionCamera.
Level Crossing I l lumination,(floodlight).
12N 11
Vehicle Access Point toRailway.
Foot Access Point toRailway.
1413
Footpath Across Railway.Public Crossings,a) FP = Footpath,b) BW = Bridleway.
Authorised Walkway AcrossRailway (Staff Crossing).
1615
Barrier
Terminology Terminology SymbolSymbol
LCU
N 05
N 08
VF
FPW
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Signals [mileage / ki lometreage to be shown at base of structure]
Terminology Terminology SymbolSymbol
Signal Canti lever.Signal Gantry. N 08N 07
Side Fixing on otherconstruction.
Suspended Doll from otherconstruction. N 06N 05
Tee Bracket, Equal SidedBracket.
Side Bracket on StraightPost.
N 04N 03
Half Bracket.Signals, Straight Post. N 02N 01
Railway Constructions
Terminology Terminology SymbolSymbol
Tunnel,# = name and length.
Overbridge,# = number.
N 10N 09
Bridge, Movable Span SwingBridge, # = name andnumber.
Underbridge, # = number, orViaduct, # = name, numberand length.
N 12N 11
Turntable, Engine.Turntable, Wagon orCoach.
N 14N 13
Traverser over 3 tracks.Stat ion Platform, # = nameand number, effective length.
N 16N 15
Water Columneg.:- for 2 tracks.
N 17
##
#
#
#
Electrif ication
Terminology Terminology SymbolSymbol
Track Parallel ing Hut.Arrow indicates connectionpoint of return feeder.
Electric Traction Sub Station.Arrow indicates connectionpoint of return feeder.
1819
Electrif ication Mast withHeadspan.
Electrif ication Gantry. 2021
Electrif ication Mast. 23 22
s
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Signal Box, Lever Frame,eg. Operator Back To Track.
PSB / SCC, with VDUWorkstat ion.
N 10N 09
PSB / SCC, Console andDiagram.
Power Signal Box [PSB] /Signall ing Control Centre[SCC], Panel Only.
N 08N 07
Ground Panel, Covered,eg. Operator Sideways To Track,No. indicates the No. offunctions.
Ground Panel, Uncovered,eg. Operator Facing Track,No. indicates the No. of functions.
N 06N 05
Ground Frame, Covered,eg. Operator Sideways to Track,# = release method.
Ground Frame, Uncovered,eg. Operator Back To Track,No. of Strokes indicates No. oflevers. # = release method.
N 04N 03
Relay Room, RR,Relocatable Building, REB.
Gate Box, Text to indicatemethod of control.
02N 01
Signall ing Control
Terminology Terminology SymbolSymbol
G
#
5 5
#
RR
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4.2.3 Points and Connections
Terminology AC Electrif ied LineSymbol [AC]
DC Electrif ied LineSymbol [DC]
Non Electrif ied LineSymbol [NE]
Single Rail. Thick l ineindicates insulated rail.Thin l ine indicatescommon rai l .
Plain Line. Track Circuited.05
04
03
As [NE].Any raised metal postsigns shall be shownas for [AC] signal above.Not Shown.
4.2.2 Signs, [see end forStructures].
As [NE].Additionally, base tobe earthed.
Signal Base posit ionand distance (miles /ki lometres).
4.2.1 Signals, Indicators andIndications, [see end forStructures].
Terminology AC Electrif ied LineSymbol [AC]
DC Electrif ied LineSymbol [DC]
Non Electrif ied LineSymbol [NE]
Plain Line. Not Track Circuited,l ine name and directionalarrows.
0201
Double Rail. 06
Stainless Steel Welded Strip, along length shown. 07
Points:- Lie of points andmethods of control (with theexception of motor pointsrequiring extended timbers &soleplates) not to be shown.a) not insulated,b) insulated. +
0908
Permanent Way Layouts:- The insulated rail joints are not shown in these examples, as their posit ions may vary with the installation.
Terminology AC Electrif ied LineSymbol [AC]
DC Electrif ied LineSymbol [DC]
Non Electrif ied LineSymbol [NE]
a) Fixed Diamond Crossing,b) Switch Diamond Crossing.
11
a) Single Slip,b) Double Slip.
10
1312
Additionally, base tobe earthed.
UP MAIN Not Electrif ied, no continuity bond.*
Continuity bond one rail.*c c c c
c c c cc c c c
Continuity bond both rai ls.*
AA
AA
a) b)
a) b)
a) b)
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Buffer Stops,a) insulated,b) not insulated.
01
4.2.4 Track Details / Apparatus:- Line Names, Directional arrows and Mile / Kilometre Posts shall be shown.Gradient Posts need not be shown, but may assist location of equipment.Sand Drags and Sand Humps as 4.1.4 over both rai ls.
Permanent Way Layouts (cont inued).
03
06
08 09
07
05
04
02a) Trap Point without crossing,b) Trap Point with crossing.
a) Wide to Gauge Trap,b) Derailer.
Scissors Crossover
a) Swing Nose Crossing,b) Points Clipped & Padlocked Out Of Use [C&P].
a) Point Numbering andIdentification Lettering,b) Point controlled by PointMotors [Left Hand fixing shown],requiring extended sleepers &soleplates.
Terminology AC Electrif ied LineSymbol [AC]
DC Electrif ied LineSymbol [DC]
Non Electrif ied LineSymbol [NE]
Terminology AC Electrif ied LineSymbol [AC]
DC Electrif ied LineSymbol [DC]
Non Electrif ied LineSymbol [NE]
Scotch Block requiringinsulating.
Track Circuits [TC]
Terminology AC Electrif ied LineSymbol [AC]
DC Electrif ied LineSymbol [DC]
Non Electrif ied LineSymbol [NE]
Insulated Rail Joints [IRJ]between separate TC's.
11
12
13
15
171614
10
a) a)
a) b)
a)
C&P
b)
a) b)
26AHW
a) b)
Single Rail.
Single to Double Rail.
Double Rail.
AA AB
AA AB
AA AB
AA AB
AA AB
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Track Circuits [TC] (continued)
TerminologyAC Electrif ied Line
Symbol [AC]DC Electrif ied Line
Symbol [DC]Non Electrif ied Line
Symbol [NE]
Traction Red Bond.* 14
15
Track Circuit Parallel ing orContinuity Yellow Bond.
Jointless connection betweentwo separate TC's: Tuned Zone.
N / A
08
06
IRJ, TC to left, none toright.
IRJ between sections of thesame TC or overal l TC. Doublerail TC's shown.
01
03
05
02
04
Jointless connection betweentwo separate TC's: Overlay (oneend feed), RH end.
07
Standard Track Circuit SeriesBond.
0909
10 11N / ATraction Return Bond.*
13N / A N / A
Transposit ion Bonds. 16
1817
Traction Cross Bonds orContinuity Yellow bond.*
AC Traction,a) Earth Wire,b) Return Conductor.*
N / A
N / A
N / A
19
21
23
20
22
2524 N / A
Double Rail.
Single Rail.
12
Single Rail.
Double Rail.
Double Rail.
Single Rail.
AA2AA1
AA
AA
AA CC
CC
CC
AA CC
CC
CC
AA AB
AA AB
Y
AA AA
**
RAA
RC
AA AAAA AA
AA AA AA AA
E Wa) RC b)R
YAA
BA
AA
BA
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Track Circuits [TC] (continued)
Terminology AC Electrif ied LineSymbol [AC]
DC Electrif ied LineSymbol [DC]
Non Electrif ied LineSymbol [NE]
Wide to Gauge Trap Pointsfitted with two insulatedinterrupters and Relay.
Trap Points with insulatedInterrupter.
Track Circuit end connections;show tai l cables only when notshown on circuit diagrams.
15
12
Impedance Bond,a) Internally Tuned,b) Externally Tuned.
DC Traction ReturnImbalance Bond / Jumpers.*
03
06
11
04
14
TCAIDa) D (only in one directionas arrow),b) N (both directions).
13
a) Short TC,b) Gap,# = state length.
Trap Points. Add INT R Whereinsulated Interrupter is repeatedseparately from track circuit.
a) Clearance Point; Joint A foul,Joint B adequately clear,b) Crit ical Clearance Pointidentif ied as Fouling Point; JointB at fouling point, plus crit icalmeasurement, # = statemeasurement required,eg.:- 6ft + 16ft[min].
Overlaps.
Track Circuit Type Identif ication; Single or Double Rail TC's, Joints and Impedance Bonds not shownfor clarity.
18N / ADirect Current [DC] feed [T] andrelay end [R],B = positive, N = negative.
Terminology
Direct Current [DC] withadditional feed end relay.
Non Electrif ied LineSymbol [NE]
AC Electrif ied LineSymbol [AC]
DC Electrif ied LineSymbol [DC]
2019
17
16
10
08
07
09
05
01 02N / A
N / A
N / A
N / A
AAAA
a) b)
ABAATB
RN
RBTN
a) b)
AB
#a) b)
#
INT R
TBTN
#
#
1
2
CP
B
A
a)
FP6 f t
B
A
b)+16 f t (min)
O / L
RB
RNTN
TB
ABAA
RB
RNTN
TB
ABAARNF
RBF
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Track Circuit Type Identif ication (continued)
Terminology AC Electrif ied LineSymbol [AC]
DC Electrif ied LineSymbol [DC]
Non Electrif ied LineSymbol [NE]
Diode. 0201
GEC - Alsthom; DC HighVoltage Impulse [HVI],+ = positive, - = negative.
Alternating Current [AC],# = state frequency; 50, 75,83.1/3 Hz. TBX = Feed Posit ive,RNX = Relay negative.
AC Frequency Track Circuits;Reed; # state frequency xxx;TX = Transmitter,RX = Receiver / Relay.LP = Low Power,ET = End Type Tuning Unit.
TI21 Jointless, # = statefrequency code, key as above.
TI21 Centre fed, # = statefrequency code, key as above.
ASTER Jointless, # = statefrequency xxxx, key as above.
Axle Counters, Track Sectionsto be shown and identif ied.
Treadles to be shown asattached to one rail or bothand as shown in 4.1.4.
Hot Axle Box Detectors tobe shown attached to eachrail.
Depression Bars, Electrical to beshown adjacent to appropriaterail, a) Independent (E),b) Working with track circuit (T).
AWS to be shown withEffective Direction.
Staff Protection Limits not to be shown
Terminology AC Electrif ied LineSymbol [AC]
DC Electrif ied LineSymbol [DC]
Non Electrif ied LineSymbol [NE]
Trainstops not to be shown
03
04
05
06
07
08
111009
12
13
14
1615
17 18
N / A
N / A N / A
N / A
ABB X
NX
AB ( HVI )
T ( + )
T ( - ) R ( - )
R ( + )
AA
AB ( # Hz )
TBX
TNX RNX
R B X
AA
AB2 ( f # )RX
RX
AA TXAB1 ( f # )
End Fed [end tuning unit], Intermediate Simple Loop.
Overlay TC.
AB2 ( f # )RX
RX
AA TXAB1 ( f # )
Compound Loop
RX TXAB ( f # )
Centre Fed
AB2RXAA RX( f # ) TX AB1 ( f # )
ET
RXAA AB (f #)
Type U or SF15
AA ( X ) AB ( X ) AC ( X )
RF
E
TB
T TN
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AC & DC Electrif ication Neutral Sections not shown except when required for Electrif ication Engineersspecial bonding.
Terminology AC Electrif ied LineSymbol [AC]
DC Electrif ied LineSymbol [DC]
Non Electrif ied LineSymbol [NE]
All types of signal or sign withmetal post. For signal, addsignal number.
4.2.5 Other Apparatus; no i tems to be shown.
Conductor Rail Protection, SingleBoard and Double Board.*
0403
DC Electri f ication ConductorRail and Gaps.*
02N / A 01
4.2.6 Level Crossings; All the level crossing symbols to be shown as in 4.1.7. On AC Electrif ied l ines allraised metal structures, including metal gates and barriers, to be shown and earthed as shown below.4.2.7 Structures; Bonding shown as considered necessary.
Non Electrif ied LineSymbol [NE]
AC Electrif ied LineSymbol [AC]
DC Electrif ied LineSymbol [DC]Terminology
Metal Overbridge.
Metal Underbridge or SwingBridge.
Station Platform, Metal Awningor Rail ings.
All Electrif ication Masts andGantries. # post numbering tobe identified.
All Metal Location supports,Ground Frame supports/structures, and other metalraised structures.
Non Electrif ied LineSymbol [NE]
AC Electrif ied LineSymbol [AC]
DC Electrif ied LineSymbol [DC]Terminology
Electric Traction Sub Stations and Track Power Huts specially bonded by Electrif ication Engineer
N / A
N / A
N / A
N / A
05 06 07
08 09 10
11 12 13
14 15 16
17
20
18
21 22
19
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Obsolete Signals
Terminology Terminology SymbolSymbol
Combined "D" and "T" sign."D" sign, (Fireman's Call Plunger). 1009
Fireman's Call Plunger.Points Indicator. 0807
Points spring 2 way."T" Telephone sign. 0605
Signals to be removed.I l luminated Sign. 0403
Banner Signal.Light Signals, Slot. 02
Points released by Key onToken.
Points released by Token. 1211
Point Key Locks One / TwoWay.
Points released by Key fromSB.
1413
Emergency Replacement Button(auto).
Impedance Bond. 1615
Trip Cock Test indicator.Turntable bolt. 1817
Road Crossing Signal (visual).Crank Handle Releaseinstrument.
2019
Level Crossing road sign.Road Crossing signal(audible).
2221
Facil it ies on panel to overridetrack circuit control.
Catt le Guard. 2423
Right Away indicator "R".Points fitted with switch heater. 2625
Radio Channel.Permanent speed restrict ionwarning indicator, also,differential speed signing.
2827
Turnout Speeds.Line Speeds. 3029
Overlap TC joint, both directionson bi-directional l ine.
Overlap TC joint. 3231
01
T
PH CH
3060
30 60
S
KL
KL
E
0
RorR
3
20
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