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Railtrain > Rail Vehicle Detection System > Flashcards

Rail Vehicle Detection System Flashcards

1
Q

Rail Vehicle Detection System

A

a system of safeworking infrastructure used in axle counter territory and continuously track-circuited territory in the Rail Network

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2
Q

Rail Vehicle detection track

A

a portion of track formed into an electric circuit where current is carried through the rails and used to detect the presence of trains

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3
Q

Track circuits

A

used in the operation and control of points and signalling equipment

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4
Q

Electronic operation of rail vehicle detection system

A

The computer system that operates the safeworking infrastructure

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5
Q

Describe how the computer system operates the safeworking infrastructure

A

takes instructions fed from the Network Control Officer and track circuitry information to operate points/switches, signals and level crossings throughout the Rail Network

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6
Q

Benefits of a computer system controlling rail vehicle detection system

A

Will not allow conflicting rail movements to be set up accidentally, will always provide a failsafe outcome should a computer fail in service

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7
Q

The computer system for safeworking is protected via

A

redundant electronics and an Uninterruptable Power Supply (UPS) to ensure that the system remains fully operational during a blackout or loss of service power from the city supply

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8
Q

Describe how a track circuit signal displays “clear”

A

The rail block immediately ahead of the signal must be unoccupied so that the electric signal can be sent down each rail and the signal relay will energise to make the signal show

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9
Q

Describe how a track circuit signal displays “STOP”

A

When a train’s wheelset occupies a circuited part of the block, the energising batter/power supply is interrupted and causes the signal relay to ‘drop out’, allowing the red signal to become illuminated

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10
Q

Functionality of Rail Vehicle detection is provided by an electronic system and includes the setting of routes and points, including through

A

setting of signals, auto re-clearing of signals, over ride controls, blocking, train description and Automatic route setting based on timetables

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11
Q

Automatic route setting

A

where the paths for trains are set in accordance to the timetable or train path with alarms to the operators when it is not possible to maintain timetable order

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12
Q

The system information is used to

A

monitor correct sequence of track circuit occupancy or loss of train/points or switch mechanism detection under trains. Also provides information to other computer based systems.

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13
Q

Train Description

A

presented through coloured bars which denote the degree of early or late running of a train. Will show all static and dynamic information regarding that piece of infrastructure or rolling stock

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14
Q

Braking distance depends on

A

gradient, train type, line speed set by the “Cheif Engineer of Track”

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15
Q

The Rail Vehicle Detection system uses continuous track circuiting or axle counters to

A

detect the presence of rail traffic in a block and prevent following rail traffic entry into occupied blocks

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16
Q

The Rail Vehicle detection system is used on

A

single lines (for bidirectional movements), double lines (for bidirectional or unidirectional movements)

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17
Q

Entry to and exit from sections is authorised by

A

controlled signals

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18
Q

Controlled signals are operated by

A

signalling equipment controlled by Network Control Officers or Axle counters/track circuits

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19
Q

Automatic signals are operated by

A

continuous track-circuiting

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20
Q

If the Rail Vehicle Detection system of Safeworking fails,

A

A method of special working may be introduced

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21
Q

Interlocking of axle counters, track circuits, points and protecting signals prevents a running signal from displaying a proceed indication unless

A

the block beyond the signal is not occupied, there are no conflicting routes set, the points are correctly set

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22
Q

Authority to enter a block and proceed through a block is given by

A

clearance of the signal that controls the entry

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23
Q

With Proceed authorities, drivers must

A

Obey signals, pass signals at STOP only in accordance with Rule NSG 608, ANSG 608 or CNSG 608 “Passing signals at STOP” depending on the relevant track owners specific equipment

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24
Q

Clearing of the relevant signal gives

A

a proceed authority

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25
Q

Qualified Workers must switch a signal box or local control panel in or out of operation only with

A

the authority of the Train Controller, the agreement of the Network Controll officers responsible for controlled signals that will be affected, the agreement of the Protection Officer, if a work on track authority has been issued for the affected portion of the line

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26
Q

A signal box/local control panel must not be switched in while

A

rail traffic is closely approaching the location as this could return the signals to STOP

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27
Q

A signal box/local control panel must not be switched in or out for

A

management of rail traffic if rail traffic is travelling under manual block working conditions on the affected portion of line

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28
Q

Manual block working

A

manually prevents rail traffic entries into occupied blocks

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29
Q

Manual block working must be used if

A

it is specified in other Network Rules, a train has been advertised as a block train, rail traffic does not reliably operate track-circuits, the Network Control Officer needs to block work rail traffic, the signalling system is not/might not be operating correctly

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30
Q

Signals passed at stop during basic block working must

A

be passed in accordance with NSG 608 passing signals at STOP

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31
Q

Signal

A

A trackside piece of infrastructure that provides the Train Crew a visual indication of the status of the track ahead of the intended movement

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32
Q

What are signals used for

A

used to facilitate the safe and efficient movement of trains.

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33
Q

The design of the signalling system provides

A

safe separation between trains provided the system is working within its designed parameters

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34
Q

At some signalled locations, starting or home/starting signals governing entry to Train Order or Token territories may display

A

a pulsating white light

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35
Q

Trackside signals are used to

A

authorise through movements from one signal to the next

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36
Q

Trackside signals may be passed only in accordance with

A

Network Owner Rule 606 (Responding to signals and signs), Network Owner rule 608 (Passing signals at stop)

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37
Q

In the New South Wales rail network, running signals provide information about

A

the route for which a signal is cleared

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38
Q

In colour light signalled territory, a cleared signal indicates the condition of the route or block immediately beyond the signal by

A

the combination of lights displayed, a route indicator, a lower turnout unit

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39
Q

Lower quadrant semaphor running signals have

A

large arms to control main line movements or medium arms to control diverging movements

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40
Q

Types of Controlled/Absolute signals

A

Outer home or accept, Home, Starting, Home/starting, Distance

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41
Q

Types of Automatic or Permissive signals

A

Automatic, distant

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42
Q

Outer home or Accept signal

A

A controlled signal used to control entry to the block ahead, but not otherwise protect points or other identified risks

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43
Q

Home Signal

A

Used to protect points and other identified risks (some home signals are kept permanently at stop)

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44
Q

Starting signal

A

Used to authorise departure from a controlled area

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45
Q

Home/Starting signal

A

Functions as home and starting signal

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46
Q

Distant Signal (Controlled)

A

May show clear or caution and cannot be used to protect the portion of line to the next signal, however there are in some instances where controlled distant signals can show stop and can be used to protect the portion of line to the next signal

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47
Q

Automatic (permissive) Signal

A

Protects the block ahead. Displays a PROCEED indication only if the block ahead is unoccupied

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48
Q

Distant signal (automatic)

A

May show clear or caution and cannot be used to protect the portion of line to the next signal, however there are in some instances where controlled distant signals can show stop and can be used to protect the portion of line to the next signal

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49
Q

Controlled signals are operated by

A

signalling equipment controlled by Network Control Officers or a combination of track circuits, or axle counters and signalling equipment controlled by network control officers

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50
Q

Controlled signals can display a PROCEED indication only if

A

points in the route are in the correct position, there are no conflicting routes set, In Rail Vehicle Detection territory the block ahead is unoccupied

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51
Q

Controlled signals at attended locations are

A

absolute signals

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52
Q

Absolute signals that are Controlled signals at attended locations

A

Double light colour light, single light colour light, Lower quadrant semaphore signal

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53
Q

Double light colour light signal

A

Pair of Vertical lights

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54
Q

double light and single colour light signals become automatic when

A

An A sign or illuminated A light is on or near the signal

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55
Q

Single light colour light signal

A

marker light vertically below main signal nights

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56
Q

Automatic signals become absolute signals if they

A

are so designated by an instruction sign, are interlocked with trackside monitoring equipment that sets them at STOP or can be switched between automatic and controlled operation

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57
Q

Double light colour light signals with staggered light cases are

A

automatic signals, distant signals

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58
Q

Double light colour light signals with vertical in line light cases are

A

controlled signals or Automatic signals if an A is fitted or an A light is lit

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59
Q

Single light colour light signals with a staggered marker light are

A

automatic signals or distant signals (single)

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60
Q

Auomatic single light colour lights have a red marker light. The marker light is lit if

A

the signal is at stop or the main light fails

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61
Q

Single colour light distant signals that cannot indicate STOP have

A

a yellow marker light that is lit if the main light fails

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62
Q

Some distant signals indicate stop if

A

the line between the distant signal and the next signal is occupied or the distant signal fails

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63
Q

Distant signals that can indicate STOP have a red marker light that is lit if

A

the signal is at STOP or the main light fails

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64
Q

Distant signals may have a signal identification sign with

A

the same signal identification as the signal ahead. The identification sign includes the word DISTANT

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65
Q

Single colour light signals with an in line red marker light are

A

controlled signals or automatic signals if an A sign or an A light is lit (single)

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66
Q

The marker light on a single colour light signal is lit if

A

the signal is at stop or the main light fails

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67
Q

A proceed indication for a turnout route is displayed by

A

a diagonal row of yellow lights on the turnout unit. The row of lights is angled up towards the turnout route

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68
Q

Co-acting signals

A

may be used to provide information about the running signal indication if a running signal may be obscured from a driver’s view

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69
Q

Co-acting signals may have

A

a plate showing CO-ACTING, INDICATOR, or an abbreviation; a signal identification sign with the same details as those on the primary signal

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70
Q

An intermediate signal, known as a repeater signal, may

A

be provided at some locations to give a driver better information about the indication of the next signal

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71
Q

Shunting Signals

A

Controlled signals operated by Network Control Officers or other Qualified Workers, Used to authorise shunting movements

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72
Q

Shunting signals must only be passed in accordance with

A

rule NSG 606 responding to signals and signs. Only within the next section, must not be a through movement

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73
Q

If a colour light shunting signal controls movements over more than one route

A

a route indicator is usually provided

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74
Q

Subsidiary Signals

A

a small colour light or small semaphore signal placed below running lights. If it displays proceed, the running signal displays stop

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75
Q

General purpose shunting signals are placed

A

beside running lines, within shunting yards

76
Q

Calling on signals

A

Shunting/subsidiary signals attached to home signals, authorise a movement past the running signal, indicate that the points in the route are locked, but do not indicate that the line ahead is clear

77
Q

Intermediate shunting signals

A

shunting signals that are placed between two running signals, facing in the same direction as the running signals. May be used to authorise a shunting movement

78
Q

When the first running signals displays a PROCEED indication, the intermediate shunting signal

A

displays PROCEED for the running movement

79
Q

Shunt repeater sign

A

designates a shunt repeater signal

80
Q

Shunt repeater signals

A

are placed as subsidiary signals below controlled running signals, show that the shunting signal below the next running signal displays a PROCEED indication

81
Q

For calling on, the signals will display

A

A steady small yellow light

82
Q

Shunt ahead signals

A

fitted as subsidiary signals to starting signals or home/starting signals, authorise a shunting movement past that signal, but must not be used as authority to proceed through a section

83
Q

For shunt ahead, the signals will display

A

A small flashing yellow light

84
Q

Dead end signals

A

fitted as subsidiary signal to home or home/starting signals only, are on brackets placed on the same side as the route for the authorised movement (usually a dead end siding), authorise a shunting movement from the running line to a dead end siding, may be used for movement from a running line to a yard or loop

85
Q

Describe Running signal indications

A

The legal PROCEED and STOP indications shown by colour light and semaphore signals in the Rail Network showing from Least restrictive (Highest/Top) aspect to most restrictive (lowest/bottom?) aspect

86
Q

Describe a clear PROCEED, next signal displays a PROCEED indication

A

Single: Green
Double: Green/Green
Lower Quadrant: Angled down, Green

87
Q

Preliminary Medium indication

A

a Green light over a pulsating yellow light, indicating that the signal ahead is displaying medium

88
Q

Purpose of a preliminary medium indication

A

to assist drivers in identifying the turnout signal when multiple warnings are provided in areas of high speeds and/or close signal spacing

89
Q

Indication for Double: Green/Pulsating yellow

A

PROCEED, next signal displays at least MEDIUM indiciation

90
Q

Indication for Single: pulsating yellow

A

Medium PROCEED, next signal displays at least a CAUTION or CAUTION TURNOUT indication (PY)

91
Q

Indications for Double: Green/Steady yellow

A

Medium PROCEED, next signal displays at lead a CAUTION or CAUTION TURNOUT indication (G/SY)

92
Q

Indications for Single: Red/ Triple Pulsating yellow at angle

A

Medium turnout PROCEED on turnout route, next signal displays at least a CAUTION or CAUTION TURNOUT indication (R/TPY)

93
Q

Indications for Double: Yellow/Yellow

A

Medium turnout PROCEED on turnout route, next signal displays at least a CAUTION or CAUTION TURNOUT indication (Y/Y)

94
Q

Indications for Single: Steady yellow

A

Caution PROCEED, next signal may be at STOP (Y)

95
Q

Indications for Double: Green/Red

A

Caution PROCEED, Next signal may be at stop (G/R)

96
Q

Indications for Single: Red/ Triple steady yellow at angle

A

Caution turnout PROCEED on turnout route. Next signal may be at STOP (R/)

97
Q

Indications for Double: Yellow/Red

A

Caution turnout PROCEED on turnout route. Next Signal may be at stop (Y/R)

98
Q

Indications for Single Lower Quadrant: Red over white/green

A

Caution turnout PROCEED on turnout route. Next signal may be at STOP (LQ)

99
Q

Indications for Single: RED, red green

A

Low Speed PROCEED ready to stop at next signal (Rrg)

100
Q

Indications for Double: RED/RED, green

A

Low speed PROCEED ready to stop at the next signal (Double)

101
Q

Indications for Single: RED, red, Close up green

A

Close up PROCEED ready to stop at the next signal (line ahead may be occupied) (Single)

102
Q

Indications for Double: RED/RED, close up green

A

Close up PROCEED ready to stop at the next signal (line ahead may be occupied) (Double)

103
Q

Single colour Indication for Stop

A

RED, red

104
Q

Double colour indication for STOP

A

RED/RED

105
Q

Single lower quadrant indication for stop

A

Horizontal RED

106
Q

Describe the starting or home/starting signals that govern the entry to Train Order or Token Territories

A

Display a pulsating WHITE aspect in lieu of a GREEN aspect and traffic is authorised to depart the signalled location only if the crew is in possession of the correct authority for the section

107
Q

Colour light repeater signals

A

take the same form as colour light running of shunting signals. Might show a less restrictive indication than the repeated signal

108
Q

Indication of Vertical/staggered “" white lights on a repeater signal

A

PROCEED. Next signal shows PROCEED

109
Q

Indication of Horizontal white lights on a repeater signal

A

PROCEED, next signal shows STOP

110
Q

Restricted speed

A

a speed that allows rail traffic to stop short of an obstruction within the distance of clear line that is visible ahead

111
Q

Controlled Speed

A

a speed that allows rail traffic to stop short of an obstruction within half the distance of clear line that is visible ahead

112
Q

In single and double colour light signalled territory, multi lamp route indicators on running signals, in most cases, the

A

turnout route

113
Q

If the signal displays a PROCEED indication, the route indicator shows

A

Letters usually related to the name of a line. And numbers, usually referring to the number of a station platform or a designation of track within a yard

114
Q

Route indicators on shunting signals or co-acting signals may show

A

a running line turnout route or a shunting route

115
Q

Turnout repeaters

A

placed at safe braking distance from points to give advance warning that a turnout route is set

116
Q

If the running signal below the turnout repeater displays STOP, CAUTION or LOW SPEED, a turnout repeater does not illuminate because

A

the repeater indication will not be applicable for the following signal

117
Q

Mail line indicators

A

show the condition of points and level crossing. Are identified by a black letter on a white reflective diamond attached to the indicator post. DO NOT that the line is clear or give authority to be in the section in Train Order/Token Territory

118
Q

If main line indicators are able to display a STOP indication, they may be passed at STOP only in accordance with

A

Rule NSG 610, ANSG610, CNSG 610 passing indicators at stop

119
Q

indication of a pulsating white light on a main line indicator

A

Points are set for the main line, and warning equipment at a level crossing is in working order

120
Q

indication of a steady yellow light on a main line indicator

A

The next main line indicator may be at STOP

121
Q

indication of a steady red light on a main line indicator

A

STOP. Points may not be set for the main line, or warning equipment at a level crossing may not be operating to warn road traffic

122
Q

indication of a steady red light with angled white lights on a main line indicator

A

Points are set for the turnout

123
Q

Main line indicator repeaters are identified as

A

‘REPTR’ under the same black letter as the main line indicator being repreated

124
Q

Indication of a pulsating white light on a main line indicator repeater

A

the main line indicator being repeated is not at STOP

125
Q

Indication of a steady yellow light on a main line indicator repeater

A

The main line indicator being repeated may be at STOP

126
Q

Point indicators

A

used to indicate the position of points

127
Q

Catch point indicators

A

show the position of catch points

128
Q

Point indicators and catch point indicators may be

A

colour light or mechanical

129
Q

Indication of a colour light point indicator set at Red

A

the points are not set

130
Q

Indication of a colour light point indicator set at white arrow

A

the points are set and locked for the route indicated by the direction of the arrow

131
Q

Mechanical point indicators (arrow type) with an illuminated white arrow indicate

A

the route is set, but does not indicate whether points are locked

132
Q

If the mechanical point indicator (bar type) shows a Horizontal (STOP) white bar, it indicates

A

the points are unlocked, or are not set in normal position. The crew must stop and check the position of the points

133
Q

If the mechanical point indicator (bar type) shows an angled (45 degree) white bar, it indicates

A

The points are set and locked in NORMAL position.

134
Q

If the U indicator is lit

A

the controlling signal box is unattended and points beyond the home/starting signal are locked in NORMAL position

135
Q

If the starting or home/starting signal directly protects a Type F level crossing, illumination of the U indicator shows

A

that the warning equipment is in working order

136
Q

Illuminated white/orange warning lights are provided at

A

locations where workers on track have a restricted view of approaching rail traffic. If rail traffic approaches, the lights go out

137
Q

Illuminated white crossing lights, sometimes combined with audible warning devices as additional alarms are

A

provided at pedestrian crossings restricted to used by rain workers. If rail traffic approaches, the lights go out and alarms are activated in time for workers to go to, or remain in a safe place

138
Q

Dead end lights

A

small red lights to indicate the end of dead end sidings. The lights display STOP indications only.

139
Q

If it is possible for a dead end light to be mistaken as a running signal at STOP, a

A

white light above the red light is used to distinguish it from a running signal

140
Q

Guards indicators

A

Indicators placed over the platform if it is possible for the signal at the exit end of a platform to be obscured from a guard’s view

141
Q

A guard’s indicator will show a lunar white or blue light if

A

the exit end signal displays a PROCEED indication

142
Q

Yard Limit signs

A

define the limits of yards, define the end of a section and in train order territory define the yard limits of a train order location

143
Q

Drivers must respond to YARD LIMIT signs in accordance with

A

rule NSG 606 responding to signals and signs and Rule NTR 418 Yard Limits

144
Q

A location may be a

A

Signal, STOP sign, Main line indicator, YARD LIMIT sign

145
Q

Location signs are used to indicate

A

approach to a location. In signalled territory they give additional warning of approach to a signal

146
Q

Location signs are placed

A

no more than 3000m before the location and at a safe braking distance from the location

147
Q

Train crew must respond to Landmark and Location signs in accordance with

A

Rule NSG 606, ANSG 606, CNSG 606 Responding to signals and signs

148
Q

Describe a landmark sign

A

Triangular Reflective yellow sign with the middle cut out

149
Q

Describe a location sign

A

Triangular Reflective yellow sign, usually with the location listed beneath

150
Q

Shunting Limit signs

A

indicate the limit to which a shunting movement may be made on a running line, have white text on a red reflective or illuminated background

151
Q

STOP signs

A

may be passed only if authorised, have white text on a red reflective background

152
Q

Clearance posted

A

usually located between two converging lines to show the clearance limit

153
Q

Some clearance posts have

A

a reflective background or a white light that must be illuminated at night or in conditions of low visibility

154
Q

Catch point signs

A

indicate that there are catch points ahead, have white text on a red reflective background, are provided where catch points are not protected by a fixed signal or indicator

155
Q

Derail signs

A

indicate that there is a derail device ahead, have white text on a red reflective background

156
Q

Derail signs are provided if

A

movements can be made towards derail devices, the devices are not protected by a fixed signal or an indicator

157
Q

Train crew controlling shunting must remove derail devices before

A

authorising shunting movements beyond a derail sign

158
Q

Narrow track warning signs are placed in locations where there is restricted clearance between

A

vehicles on adjacent lines, the track and other infrastructure or buildings

159
Q

Workings performing shunting at locations with narrow track clearances must

A

not stand between a moving vehicle and a vehicle standing on an adjacent track

160
Q

Worksite warning signs

A

Placed on the departure end of a platform to indicate than an inner HandNetwork Control Officer is located ahead

161
Q

Describe worksite warning sign placement in the ARTC and CRN network

A

must be placed at the departure end of the last platform on approach, in a position where it can be clearly seen by the driver of the approaching train to maintain awareness of a inner HandNetwork Control officer ahead

162
Q

Describe worksite warning sign placement in the Railcorp network

A

Located beyond the departure end of a platform to allow the driver to see the sign while stopped at the platform.

163
Q

Distant warning signs

A

Black and white diagonally striped sign, used during pilot staff working if there is no signal within 2000m of a STOP sign being used to protect points or a crossover

164
Q

Prohibitive signs

A

if a signal carries a prohibitive sign, Train crew must follow the directions on the sign

165
Q

Slip site signs

A

signals are interlocked with slip detectors to respond to landslips

166
Q

Describe how slip detectors work

A

Track circuitry is connected to the rail line to monitor track movement. Any movement of the track geometry will result in activation of an electronic sensor to put signals into the STOP position and alert the Network Controller of possible track defects

167
Q

Tonnage sign

A

might be fitted on or near a signal placed before a rising grade so the train is not stopped at a signal on a portion of track that is particularly steep

168
Q

Purpose of a tonnage signal

A

ensures that the signal where the rising grade of concern exists will at least show a caution and therefore a train should not have to stop at that signal where starting the train may be a challenge due to the trailing tonnage

169
Q

For prescribed trains, tonnage signals are

A

absolute

170
Q

In regards to tonnage signs, if the T indicator is lit

A

drivers of prescribed trains may ignore the instructions on the TONNAGE sign

171
Q

Starting or home/starting signs

A

some starting or home/starting signals in bidirectional train detection territory have prohibitive signs fitted to them

172
Q

Distant signal/repeater signal signs

A

distant signals and colour light repeater signals than can display STOP have signs with black text on a white reflective background

173
Q

Intermediate sidings signs

A

signals that protect intermediate sidings must be passed only in accordance with the instructions on the sign

174
Q

Absolute signal signs

A

signals fitted with an absolute signal sign must not be passed at STOP without the Network Control Officer’s authority

175
Q

Token Territory signs

A

show that a token, such as a Train Staff or Electric Staff is necessary to occupy the section ahead

176
Q

Train Order working signs

A

show the beginning and end of the territory where a Train Order is required. These signs are placed at the interface to the RVD boundary

177
Q

End signalled authority signs

A

show that there is a set of manual lever operated non-interlocked points to enter a siding, loop or yard. Must not pass without the correct authority for the area

178
Q

End signalled authority signs have

A

white text on a red background in the upper half and white text on a black background in the lower half

179
Q

Block joint signs

A

show the locations of insulating block joints between separate track circuits of track circuited line, have white text on a red reflective background. Rail traffic may be required to stand clear

180
Q

Single light signal signs

A

show a change of signal type in used. May be from or to double light, train order or token territory

181
Q

Signal Identification signs

A

are fixed to running signals and some shunting signals and have letters and/or numbers that uniquely identify the signal

182
Q

Odd numbers on signal identification signs indicate

A

down direction signal

183
Q

Even numbers on signal identification signs indicate

A

Up direction signal

184
Q

Signal designation signs

A

provided for some signals and are fitted either to the signal post or to a wall near the signal

185
Q

Accept signal signs

A

Signs fitted to some accept signals showing the name of the controlling location or the word ACCEPT

Railtrain (13 decks)

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