3 Pos Signals Flashcards
🔴
🔴
Stop
Point, if any, are unknown
Track may be occupied
Must not proceed
Next signal is unknown
🟢
🔴
Clear Normal Speed:
Points, if any, are set
Track is clear
Proceed at track speed
Next signal is at proceed
🟡
🔴
Normal Speed Warning:
Point, if any, are set
Track is clear
Proceed at track speed
Next signal is at stop
🔴
🟢
Clear Medium Speed:
Point, if any, are set
Track is clear
Proceed at max 40km/h
Next signal is at proceed
🔴
🟡
Medium Speed Warning:
Point, if any, are set
Track is clear
Proceed at max 40km/h
Next signal is at stop
🔴
🔴
🧀
Low Speed Caution:
Point, if any, are set
Track may be occupied
Proceed at max 15km/h
Prepare to stop if next signal is at stop
🟡
🟢
Reduce to Medium:
Point, if any, are set
Track is clear
Proceed at track speed but reduce to medium by next signal
Next signal is a medium aspect
What is the function of 3 position signals?
More information about the track ahead
The location of Green or yellow, top or bottom lights informs the driver of what?
Points- set or not set
Track section ahead- clear or occupied
Speed- normal or medium speed
Next signal- proceed aspect or Stop
3 position signals are what type?
Light type
The A light refers to what light
Top light
The B light refers to what light?
Bottom light
The C light on a specific signal is where
Below the home signals
Name 3 classes of 3 position signals
Home
Automatic
Dwarf
How are home signals distinguished?
Vertically one above the other
How are automatic signals distinguished?
Two lights are staggered
How are dwarf signals distinguished?
Display one coloured light at a time
Who controls a home signal
The signaller
3 position home signals are fixed at and protect what?
(5 answers)
Stations
Signal boxes
Sidings
Level crossings
Junctions
What is the primary purpose of automatic signals?
To expedite the passage of trains by dividing long sections into shorter sections
Can you pass a home signal under rule 1 section 3
No
Who controls dwarf signals?
Signaller
Dwarf signals control train movements from
(4 answers)
Running line to running line
Running line to siding
Siding to running line
Siding to siding
Name the fixed signals that are absolute?
(3 answers)
Home
Dwarf
Disc
Name the signals that are permissive and what rule needs to be followed
Automatic signals
Rule 1 sec 3
Home and automatic signals are what colours?
Red 🔴
Green 🟢
Yellow 🟡
Dwarf signals are what colours
Purple 🟣
Blue 🔵
Red 🔴
Green 🟢
Yellow 🟡
Name the 3 colours on dwarf signals that mean stop
Purple 🟣
Blue 🔵
Red 🔴
What is the only colour a marker light can display?
Red 🔴
When can a low speed caution never be used?
Bi-directional portion of track
Illuminated 65 or 80 on 3 position signals tells us what about the point ahead?
High speed points
🔴
🟢
65
Clear medium speed illuminated 65:
Point, if any, are set
Track is clear
Proceed at illuminated speed
Next signal is at proceed
Illuminated letter “A” on 3 position signals home signal informs the driver of what?
-Point for the home signal, set to mainline
-Signal operating as automatic singal
-Rules that apply to passing a Stop position on automatic signals apply
What colour is the illuminated A
Red 🔴
When the signaller is operating the points and signals the Signal Box is…..
Switched In signal box
The signaller goes Off duty, the signal box is considered…..
Switched-out
Switched Out signals is also known as what mode?
Fleeting mode
3 position dwarf signals indicated what 3 aspects
Stop
Low speed caution
Clear low speed
What is the primary purpose of Banner Indicators?
To indicate the aspect of the signal ahead where a clear view cannot be obtained
Can a banner indicator have a fixed market light?
Yes
What does this banner indicator mean?
⚪️⚪️⚪️⚪️
Stop/red 🔴
What does this banner indicator mean?
⚪️
⚪️
⚪️
⚪️
Yellow 🟡
Caution/warning
What does this banner indicator mean?
⚪️
⚪️
⚪️
⚪️
Green 🟢
Proceed
If a banner indicator fails, what does the diver presume the next signal displays?
STOP
Repeating signals are used for what purpose?
To give advance warning when leaving a 2 position signals to a 3 position signalled area
Repeating signals can display what 3 aspects
Warning
Proceed
Reduced to medium
Repeating signals is advising what
🟡
🟡
Warning
Repeating signals is advising what
🟢
🟡
Proceed
Repeating signals is advising what
🟡
🟢
Reduced to medium
What is a tramway square?
Home signal protecting overhead so that voltage can be switched for tram
What is track circuitry?
When a trains front wheels pass the relay area it makes the previous signal revert back to its safest position “Stop”
