Two Position Signals Flashcards
What Aspect colours mean on three signal. Yellow red green
Can you self authorise to pass a automatic signal at stop? If so under what authority?
Yes and rule 1 section 3
What does type mean in regards to signals?
Types of signals means identifying the physical construction of the signal. Two position has light and disk. ( how it looks, bright light, target that moves.)
What does class mean in regards to two position signals? ( 7 types)
Means different types( abilities). Two position signals have 7 types
1. Disc
2. Dwarf (alone)
3. Dwarf (sidings)
4.home
5. Calling on
6.distant
Two position home signals are fixed at and protect? (5 things)
Stations
Signal boxes
Sidings
Level crossings
Junctions
All two position home signals in metro network are light type. The home signal can show red light for stop or green light for proceed.
Home signal at stop and proceed. Ptsn for both
What is a distant siginal
Are used as an advanced warning of the home signals. It displays
Caution/yellow (one of next two home signals could be red) and proceed / green ( next two lights will be green). The only distant siginal in metro is on the up approach to Frankston from Long Island junction.
What is a “calling on “ signal attached to ? And what is if for
It is attached to a two position home signal. It’s used for allowing a train to enter an occupied railroad when the track section is circulated. It only applies to the same track as the home signal above/ it’s attached to
A disk signal can be a type and class. What two aspects do they display? And where are disk signals used to control train movements? Same as dwarf
Stop/ red
Proceed / green
Two position signals operate by showing one of two aspects. What does home, dwarf, and disk signal display?
Stop
Proceed
Two position signals operate by showing one of two aspects. What do distant signals display?
Caution
Proceed
Two position. Siding dwarf and call on signals display
Normal
Proceed
Common purpose
Disk signals are used to control train movements from? 4 answers
Running line to line
Running line to siding
Siding to siding
Siding to running line