Section 20 in The Bangalore Metro Railway (General) Rules, 2011
20. Control of Signaling.
(1)(i)Main line signaling is controlled from an Operations Control Centre and operates normally under automatic control with routes being set and train intervals regulated by computer control;(ii)the Traffic Controller shall be responsible for maintaining the services at the scheduled level as far as practicable and for restoring the train services following a delay or disruption;(iii)the Traffic Controller at the Operations Control Centre may adjust the timetable and may intervene manually to set and clear routes if the timetable needs to be varied or in the event of a major disruption;(iv)normally signaling system shall permit only one train at a time in one Tunnel Ventilation Section, more than one train in one Tunnel Ventilation section can be sent only in case of emergencies, and in a case the Traffic Controller decides to send additional trains in a Tunnel Ventilation section already occupied by a train, he shall set the route manually for additional trains and shall advise train operators about this before authorizing them to proceed;(v)the Traffic Controller, if required, may hand over control of the signals at specific station to the Station Controller and a local control panel or work-station shall be provided in the station control room for this purpose;(vi)the handover takes place automatically if there is a loss of control of individual stations from Operations Control Centre;(vii)in case of complete failure of control from Operations Control Centre, the entire control may be transferred to a backup control centre at an alternate location, which may be at separate locations for traffic control and control of traction power;(viii)the Traffic Controller shall have control of all routes on the main line outside of depots.(ix)train movement shall normally be under computer control but the Traffic Controller has the capability of setting routes manually and of setting individual points, if necessary.(2)Safety Communication -(i)all communication between Operations Control Center and train operators, Station Controller, maintenance staff of electrical, rolling stock, signal and telecommunication and track and structures department and others pertaining to movement of trains shall be tape-recorded and preserved for 'incident, analysis and, training, and the mode of preservations and its duration shall be specified in special instructions;(ii)the employee of the Bangalore Metro Railway shall initiate and acknowledge radio messages in a manner that ensures establishment of communication only between intended parties;(iii)messages affecting train movements shall be addressed by the Traffic Controller to only one train at a lime:Provided that in an emergency, a blanket message may be sent by the Traffic Controller to all trains in or approaching a particular area, which must be acknowledged individually by all concerned train operators:Provided further that in an emergency, such message may be given by the Station Controller, if authorised by the Traffic Controller in this behalf.(3)Running Lines(i)the Signaling system on the running line shall be a full Automatic Train Protection system;(ii)if the speed which permits a train running on Automatic Train Protection to stop under normal braking within a limit of safety, is exceeded, an irrevocable emergency brake application is automatically made which ensures that the train does not proceed beyond the safe limit;(iii)normal operation of the train is monitored from indication on the train operator's console and each main running line is duly signaled for operation;(iv)certain lines shall be equipped for automatic train operation with provision for the train operator to assume manual control of the train if required;(v)in the event of failure of the Automatic Train Operation equipment and on lines not so equipped, train operators shall control their train up to the speed indicated on the console;(vi)where no cab indication is available, train shall be automatically restricted to a maximum speed of twenty five kilo-meters per hour in "Restricted manual mode:(vii)fixed signals are provided at the entrance and exit to each interlocked area and certain other locations.(4)(i)station Controller's control panel or work-station shall have the capability of setting routes within the area of control, and of setting individual points when necessary;(ii)on each platform, there shall be an emergency stop plunger and in the Station Control Room, a switch for each platform which when operated shall cause any approaching train to stop before it enters the platform. Any train entering or leaving or stationary in the platform shall experience an irrevocable emergency brake Duplication.(5)(i)The depot tracks may not be equipped with full complement of Automatic Train Protection and trains shall be automatically restricted to a maximum speed of twenty five kilo-meters per hour and the train operator may further restrict the speed of the train in the depot lines to a lower value as provided in the special instructions(ii)movements within depots shall be controlled by either main line type fixed Signals or position light type;(iii)control of movements within the depot shall be exercised by a Depot Controller from a control panel or work-station located within the depot;(iv)the Depot Controller shall use a control panel or work-station for setting and clearing of routes within the depot;(v)instructions to train operators as to which siding they shall drive in or depart from may be given by train radio on a dedicated depot channel distinct from that used by operations Control Center;(vi)the event of the failure of It:e radio, a Public Address system may be used;(vii)Both a verbal instruction and a proceed indication from the fixed signals shall be received before the train may move into the depot from the main line and vice versa.(6)(i)Local operation of points on running lines as and when required may only be undertaken by a Station Controller with the permission of the traffic controller;(ii)the crank handle used to manually operate the points is interlocked through a key which, when released by Operations Control Center controller or Station Controller, shall inhibit setting of routs over the points concerned, and such transfer of control should be acknowledged by the station controller before the local control can be activated;(iii)Some points in depots are trailable event of a route failure they need not be correctly set before a movement is authorised over them in the trailing direction. Non trailable points shall be protected by fixed Signals.(7)(i)All lines of the network are equipped with Automatic Train Operations in which the acceleration, braking, observance of speed restrictions and observance of signal commands are undertaken automatically;(ii)the train operators shall close the train doors and start the train from a station and monitor its functioning;(iii)all passenger trains Shall be equipped with Automatic Train Protection equipment and can be driven manually under the control of the Automatic Train protection System;(iv)any over speed or failure to brake at the appropriate time results in an irrevocable emergency brake application which shall be referred to as "Coded Manual Mode",(v)if Automatic Train Project information is not available from the track side equipment, the train can be driven with traffic controller's permission in "Run On Sight" mode in which the on board Automatic Train Protection equipment restricts the speed of the train to twenty-five kilometers per hour and when the Automatic Train Protection information is again the track, the mode automatically upgrades to coded Manual;(vi)if the Automatic Train is not available from the track or loco or cab side equipment due to fault otherwise the train may be driven with Traffic controller's permission in Restricted mode and in this mode tile on board Automatic Train Protection equipment restricts the speed of the train to twenty-five Kilometers per hour, this mode shall be used in depots and exceptionally on running lines when authorised by the Traffic Controller;(vii)if the on-board Automatic Train Protection equipment is defective, the train may be driven in "Cutout" mode as authorised by Traffic Controller and when so authorised, the Train Operator may open and operate a sealed switch and drive the train without Automatic Train Protection and in this mode, the Train Operate shall limit the speed to twenty five Kilometrs per hour and be responsible for the safe movement of the train.
