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CJCT > CBTC > Flashcards

CBTC Flashcards

1
Q

CBTC

A

Communication Based Train Control

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2
Q

ATC

A

Automatic Train Control

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3
Q

ATO

A

Automatic Train Operation

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4
Q

ATP

A

Automatic Train Protection

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5
Q

What two sub-systems make up ATC

A

ATO and ATP

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6
Q

What is ATC

A

The automatic Train Control system comprising the two sub-systems ATO and ATP

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7
Q

What is ATO

A

Automatic Train Operation - the sub-system that automates control of the train by regulating Motoring, Coasting, Braking and Stopping at Stations without the requirement of a train operator

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8
Q

What is ATP

A

Automatic Train Protection - the sub-system that continually compares the actual train speed of all communicating rail traffic with the maximum safe speed

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9
Q

What is a Carborne Controller

A

Onboard computer that controls the interface CBTC & Wayside devices to safely manage the train in UTO & PM modes

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10
Q

DCS

A

Data Communication System

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11
Q

What does the DCS do

A

Provides a communication link between ATC, ATS, MSS and CBI to enable constant communication between the sub-systems

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12
Q

ATS

A

Automatic Train Supervision

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13
Q

MSS

A

Maintenance Support System

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14
Q

CBI

A

Computer Based Interlocking

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15
Q

What is ATS

A

A centralised sub-system of CBTC used to load timetables and automatically setting routes according to timetable requirements.

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16
Q

In ATS, what happens once the timetable is uploaded

A

Routes, train launch, stopping patterns, dwell times and allocation of run numbers are automatically performed by the ATS system without operator intervention.

17
Q

What is the standard Dwell Time

A

30 seconds

18
Q

What is CBI

A

Sub-system that manages interlocking functionality, which is setting routes and ensuring safety during route setting. It handles the control of all Wayside equipment such as Points, Signals (PPI), PSDs and PEBs

19
Q

PPI

A

Point Position Indicator

20
Q

What are the six CBTC sub-systems

A

ATC - Automatic Train Control
ATS - Automatic Train Supervision
MSS - Maintenance Support System
DCS - Data Communication System
CCTV - Closed Circuit TV
CBI - Computer Based Interlocking

21
Q

CCTV

A

Closed Circuit Television

22
Q

What is CCTV

A

Fixed cameras that monitor designated areas. Some CCTV cameras have Pan Tilt Zoom where is is required to track people

23
Q

CLC

A

Central Logic Computer

24
Q

What is CLC

A

Central logic computer which manages all signalling and interlocking

25
Q

What is the Fixed Block Principle

A

Fixed Block system uses axle counters as SDD through the Central Logic Computer (CLC). The secondary device tracks train locations and track occupancy to ensure a train does not move into a set block until it is unoccupied.

26
Q

SDD

A

Secondary Detection Devices

27
Q

In Fixed Block, a PPI will indicate PROCEED when

A

The block beyond the PPI is unoccupied
There are no conflicting routes set
The points are correctly set and locked

28
Q

What is the Moving Block Principle

A

Allows the real time regulation and safe separation of rail traffic using ATP generated by the ATC sub-system. Rail traffic continually communicates speed, location and status of vehicles to maintain safe separation.

29
Q

Localisation

A

Primary detection of Rail Traffic in the CBTC system

30
Q

In Moving Block where is information sourced from

A

Beacons
Carborne Controller
Mechanical Odometer

31
Q

What is CBTC

A

Railway signalling system that uses telecommunications between trains and track equipment for traffic management and infrastructure control.

32
Q

Advantages of CBTC System

A

Optimise train speeds to gain best line capacity (headways)
Minimum trackside equipment
Automated Operations
Easy Integration
Driverless - reduces cost
Power saving
Easy expansion

CJCT (14 decks)

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