ABS and ATC Flashcards
1
Q
What does ABS stand for?
A
Automatic block signalling
2
Q
What is the object of ABS
A
- Where two or more trains head in the same direction, prevents more than one train being in a track section at the same time
- on bi directional lines to prevent trains running in opposite directions in a single line section at the same time
3
Q
How is the object of ABS achieved?
A
Securing sigs at stop
Track circuitry
Axle counters
4
Q
ABS station limits
A
Arriving home to the first auto after a departing home
Or
Arriving home to the first auto
5
Q
What does ATC stand for?
A
Automatic and track control
6
Q
What is the object of ATC?
A
- Two or more trains heading in the same direction on a single line section it prevents more than one train being in the a section at the same time
- where trains are to proceed in opposing directions in a single line section it prevents more then one train entering the single line section at the same time
7
Q
A single line section is a portion of track between where?
A
Crossing loops
8
Q
A track section is a portion of track between where?
A
Two fixed sigs
9
Q
In ATC what sig controls the entrance to crossing loops
A
Home arrival
10
Q
In ATC what sig controls the entrance to a single line section
A
Home departure
11
Q
What are the station limits of ATC?
A
Portion of track between opposing home arrivals
