Signals Flashcards
What is risk triggered commentary?
Its verbal acknowledgment of the potential risk.
It is mandatory when:
- All medium and normal speed warnings
- while preforming departure sequence
What are the 4 steps of Risk triggered commentary ?
1) Risk Recognition
2) Risk Identification
3) Risk countermeasure (perform the action)
4) Reaffirm the Risk
What does PTSN stand for ?
Points
Track ahead
Speed
Next signal
What are the Class Types of signals?
Disc
Dwarf
Distant
Home
Calling on
Name the Signal types
Light type
Disc type
What do signals protect?
Stations
Signal boxes
Sidings
Level crossings ( Tram way crossings)
Junctions
What is a Distant signal?
What aspects can it show?
A advanced warning of the upcoming home signal.
Caution or Proceed
What is the Speed in a Siding?
Maximum of 15km.
What are the colours for Two Position Dawrf signal?
Stop = Red/Blue/Purple
Proceed= Green/yellow
True or False:
Are all 3 Position signals a Light Type signal?
True
What do 3 position home signals protect?
Stations
Sidings
Signal box
Level crossings
Junctions
Will a Marker Light colour ever change?
No
What do Home signals protect?
Points
What do Automatic signals protect?
Its own Track circuit
What must happen if you lose sight of a hand signal?
Must bring the Train to STOP
What does a GREEN Flag represent?
- To proceed
- Two position Aspects are active
What is the Maximum speed when travelling from running line to running line?
40 km/h is the maximum speed unless otherwise specified
What does a “Calling On” enable?
It allows trains to enter a occupied road when the section is track circuited.
How do you differentiate an Automatic signal from a home signal?
The two lights are staggered.
What is the Primary purpose for Automatic Signals?
To expedite the passage of trains by dividing long sections into shorter sections.
What are banner lights ?
Indication to the driver of the upcoming signal when they have a obstructed view
What are Banner Lights not?
NOT a fixed Signal
NOT considered as a signal in advance
Name the 3 Position aspects
STOP : red over red
Normal speed warning: yellow over red
CLEAR NORMAL SPEED: green over red
REDUCE TO MEDIUM: yellow over green
MEDIUM SPEED WARNING: red over yellow
Clear medium speed: red over green
Low speed caution : red over red over yellow
What signals are Permissive?
Automatic (can only pass with Rule 1 section 3)
What signals are Absolute?
Home
Dwarf
Disc
Purpose of Automatic signal?
To expedite the running of trains by breaking up the block section into track sections.
When ATWS explode what does the driver have to do?
Reduce speed
Sound long whistle
Press M.A.D button
Look out for inner hand signaller
Where are the Inner Suburban area?
Richmond
Jolimont
North Melbourne
East & West bypass
Where is the Suburban Area defined as ?
Dandenong
Broadmeadows
St Albans
Laverton via westona line
Altona junction via East and West Lines
Where is the Country Area defined as?
The DOWN side of:
Altona junction
St Albans
Laverton
Dandenong
What are the 7 Types of Route Indicators?
Painted Arrow
Illuminated Arrows
Signal Aspects
Feather Type
Dual gauge route indicator
Theatre type
Illuminated Letters
Are Line indicators route indicators?
No!!!
Where must an outer flag signaller stand in a suburban Area?
1200m from point of work
Or
3 x signals in the rear of the works if within the 1200m
Where must a Inner hand signaller stand in a Suburban Area?
200m from the point of works
Where does the Outer and Inner hand signaller stand in the Inner suburban area?
Outer Flag: 2x signals from rear of the works
Inner Flag : 100m from point of work
In the country Area what must the Outer Hand Signaller do?
-Place 3 ATWS 10 meters apart on one line of the rail
- Be 2000m to 4000m from point of work
- Display yellow Hand signal ( flag)
When will Temporary speed restrictions be put in place ?
-Track Faults
-Broken rails
-Signalling and circuitry issues
- Any other circumstances requiring reduced speed.
Where is the Station limits ?
And who controls them in that area ?
Station limits are the portion between opposing Home arrivals signals.
The signaller controls the trains movement.
What is a Single Line?
Where is it controlled?
Portion of two crossing loops
May be controlled LOCALLY or REMOTELY
What is a Track Section?
Section of Track between 2 Fixed Signals
On a ABS system what exceptions can you pass a home signal at the STOP position.
Defective
Single line work
Track circuited
What are the Two types of ABS signalling
Single line
Double line
ABS defined station Limits are ?
Arriving HOME to
FIRST auto ins advance of the departing home signal
