CBTC

Question 1

CBTC

Answer 1

Communication Based Train Control

Question 2

ATC

Answer 2

Automatic Train Control

Question 3

ATO

Answer 3

Automatic Train Operation

Question 4

ATP

Answer 4

Automatic Train Protection

Question 5

What two sub-systems make up ATC

Answer 5

ATO and ATP

Question 6

What is ATC

Answer 6

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

Question 7

What is ATO

Answer 7

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

Question 8

What is ATP

Answer 8

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

Question 9

What is a Carborne Controller

Answer 9

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

Question 10

DCS

Answer 10

Data Communication System

Question 11

What does the DCS do

Answer 11

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

Question 12

ATS

Answer 12

Automatic Train Supervision

Question 13

MSS

Answer 13

Maintenance Support System

Question 14

CBI

Answer 14

Computer Based Interlocking

Question 15

What is ATS

Answer 15

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

Question 16

In ATS, what happens once the timetable is uploaded

Answer 16

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

Question 17

What is the standard Dwell Time

Answer 17

30 seconds

Question 18

What is CBI

Answer 18

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

Question 19

PPI

Answer 19

Point Position Indicator

Question 20

What are the six CBTC sub-systems

Answer 20

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

Question 21

CCTV

Answer 21

Closed Circuit Television

Question 22

What is CCTV

Answer 22

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

Question 23

CLC

Answer 23

Central Logic Computer

Question 24

What is CLC

Answer 24

Central logic computer which manages all signalling and interlocking

Question 25

What is the Fixed Block Principle

Answer 25

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.

Question 26

SDD

Answer 26

Secondary Detection Devices

Question 27

In Fixed Block, a PPI will indicate PROCEED when

Answer 27

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

Question 28

What is the Moving Block Principle

Answer 28

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.

Question 29

Localisation

Answer 29

Primary detection of Rail Traffic in the CBTC system

Question 30

In Moving Block where is information sourced from

Answer 30

Beacons Carborne Controller Mechanical Odometer

Question 31

What is CBTC

Answer 31

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

Question 32

Advantages of CBTC System

Answer 32

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