Page 558 - IRSEM_Main Book

Annexure: G2

Brief of High-Speed Rail Signalling Ahmedabad-Mumbai Route

1.1 General

1.2 Objective: Objectives of the Signaling for high speed are
The Automatic Train Control System (ATC) with the subsystems, their requirements,
Interfaces with Rolling Stock, Telecom and other Infrastructure.

1.3 Requirement of High-Speed Train Control System: High Speed System operation
requires ATC in compliance to UIC mandated requirements as well as to meet the
following;
a. Safe train operations
b. Prevention of overspeed, derailments and collisions
c. Fail safe train detection
d. Interlocking enforcement
e. Hazard protection
f. Work Zone protection
g. Headway requirements
h. Quality of Service

2 Functional Sub-Systems of ATC: ATC comprises of the following functionalities
a. Automatic Train Protection (ATP)
b. Automatic Train Operation (ATO)
c. Automatic Train Supervision (ATS)

2.1.1 Automatic Train Protection (ATP): This sub-system is responsible for the safety of train
operations. Few of the safety features enforced by ATP are;
a. Overspeed protection through speed control
b. Rollback protection
c. Maintaining inter train safe spacing
d. Ensuring correct docking/stopping of the train
e. Ensuring correct side door opening
f. Train detection, etc.

2.1.2 Automatic Train Operation (ATO): This sub-system is responsible for the automatic
operation of trains through throttle and braking control

2.1.3 Automatic Train Supervision (ATS): This function is responsible for centralized
supervision and control of the train movements. The main functions are;
a. Supervision
b. Automatic and Manual Route setting
c. Train Control and Regulation
d. Passenger Announcements and Display System management
e. Quality of Service, etc.

2.2 ATC System and sub-systems
a. Equipment and Software on-board
b. Equipment and Software along the track and wayside
c. Equipment and Software in Central Control Room

Annexure G2: Brief of High Speed Signalling – Mumbai-Ahmedabad Page 501 of 535