1994 Book of Rules and Operating Procedures PDF

OFFICI AL 1994 Book of Rules and Operating Procedures Section 2 – Fixed Signals Section 3 – Detention at Fixed Signals Section 4 – Defective Fixed Signals Joseph Dorward OFFICI  OFFICI...

OFFICI AL 1994 Book of Rules and Operating Procedures Section 2 – Fixed Signals Section 3 – Detention at Fixed Signals Section 4 – Defective Fixed Signals Joseph Dorward OFFICI  OFFICI AL Fixed Signals – Two Position OFFICI  OFFICI AL FIXED SIGNALS – Introduction The purpose of Fixed Signals is to regulate the movement of Rail Traffic on the rail network and are used to: 1. Separate and regulate Rail Traffic 2. Indicate to the train crews and other competent employees of the status of the line ahead 3. Show which route is set. Fixed Signals are located: 4. Where they enable train crews to see and respond to in sufficient time to safely control the rail movement; 5. Where they provide a sufficient overlap; 6. And are normally positioned: a. on the left hand side of the track – (can be placed on right hand side as required) b. Directly over the track to which they apply; Fixed signals are divided into two categories: Two position signals Three position signals OFFICI  OFFICI AL FIXED SIGNALS – TYPES There are three types of Fixed Signals in Operation on the V/Line Network Semaphore Signals Semaphore Signals aspects are display by a coloured arm during daylight and by coloured lights at night Light Signals Light Signals aspects are displayed by coloured lights both during daylight and at night Disc Signals Disc Signals display a red disc during daylight or coloured lights at night or where visibility is reduced OFFICI  OFFICI AL FIXED SIGNALS – CLASSIFICATIONS Fixed Signals are classified by the function performed and the location of the signal 1. Distant and Repeating Signals 2. Home Signals 3. Automatic Signals 4. Calling On and Low Speed Signals 5. Disc and Dwarf Signals OFFICI  OFFICI AL Fixed Signals – Normal Position The normal position of Fixed signals are as follows 1. Distant Signals display “Caution” 2. Repeating Signals display ‘Warning” 3. Automatic Signals display “Proceed” 4. Calling On signals display the semaphore arm as horizontal and light is obscured 5. All other Signals display “Stop” OFFICI  OFFICI AL FIXED SIGNALS – TWO POSITION GENERAL INFORMATION Two position signals display one of the following set of indications 1. Stop or Proceed 2. Caution or Proceed 3. Warning or Proceed Two Position Semaphore signals work in the lower left hand quadrant signal as shown below OFFICI  OFFICI AL FIXED SIGNALS – TWO POSITION GENERAL INFORMATION Distant Signals – Two Position The Caution aspect is indicated by a Horizontal semaphore arm or a yellow light Proceed aspect is indicated by the Semaphore arm lowered 45 and a green light OFFICI  OFFICI AL Distant Signal Distant Signals are positioned some distant to the rear of the Home Signal Distant signals must be placed to Normal position “Caution” 1. Immediately after a train passes the signal 2. Whenever there is an obstruction on the line or 3. Whenever there is a danger on the line A Distant Signal at Proceed indicates all other signals applicable to the same line as the Distant Signal are also at proceed OFFICI  OFFICI AL Distant Signal The Distant Signal indication advises the Train Driver that the Fixed signals applicable to the same line at the station/signal box are not at proceed and the train must proceed at a speed where the train is able to stop at the next fixed signal should the Home signal (next signal) be at stop. Once the home departure signal and the home signal(s) are at proceed the signalman can then place the distant to the proceed position, if either the home(s) or home departure or any signals are at stop the distant must remain in the normal position (caution). When the Train has passed the Distant signal at Caution the Home Signal may then be placed to proceed to allow the train to enter the station. OFFICI  OFFICI AL Repeating Signals The proceed signals is indicated by a green light over a yellow light The Repeating signal when used is placed at the rear of a three position Home or Automatic signal and indicates the PROCEED or STOP aspect of those signals. Repeating signal aspects are displayed by coloured lights. When the Repeating signal is at Warning, the driver must be prepared to stop at the points and ensure the points are set for the main line and in the case of a switchlock ensure the door of the switchlock is closed OFFICI  OFFICI AL Fixed Signals Two position Home Signal OFFICI  OFFICI AL Home Signals – Exceptions to passing at Stop No train must pass a Home Signal at Stop or obstruct the crossings or points applicable to the signal except 1. The Signal is defective and the Train Controller / Signaller grants authority 2. The Home Signal is controlled by track circuit and no calling on or low speed signal is provided and a train is required to enter part of a line which is occupied by another train 3. When authorised by a Pilot to enter the section where the traffic of a double line is being worked over a single line during repairs or Obstruction OFFICI  OFFICI AL Calling on Signals The Calling on signal consists of a short arm under the Home signal and applies to the same line as the Home signal In the normal position the light is obscured and arm horizontal In the proceed position the yellow light is visible or the arm is at 45 degrees below horizontal Should both signals show a proceed aspect then the signals must be considered to be at stop due to conflicting aspects OFFICI  OFFICI AL Co-Acting Signals Co-acting signals are used where a signal cannot be easily seen due to intervening obstructions. Both of the signal arms or lights are read as the one signal. The Co-acting signals can be placed on the same post with one signal considerably higher or lower than the other, as required. This must not be confused with a signal that has multiple signals applying to multiple tracks. Co-acting signals can also be placed on separate posts and these signals must not be read as separate signals. If, at any time, conflicting aspects are displayed, both signals must be considered to be at the safest position. Where there are two or more signals on the one post with only one Co-acting arm or light, then the top signal applies to the Co-acting arm or light. See some examples on next slide OFFICI  OFFICI AL Co-acting Signals examples OFFICI  OFFICI AL Two Position Automatic Signals: Two position Automatic Signals have the following features: 1. Automatic Signals use coloured lights to indicate Stop or Proceed 2. A triangular board with the letter ‘A' is attached to the signal post Proceed is Stop is indicated by a Red light indicated by a Green Light OFFICI  OFFICI AL FIXED SIGNALS – TWO POSITION GENERAL INFORMATION Two position Home signals are fixed at and protect: Stations - Junctions - Sidings - Signal boxes - Level crossings. Two position Home signals can be either semaphore or light type signal. Semaphore signals - Semaphore Home signals have a red square ended arm with a white bar and work in the lower left hand quadrant. Light signals - Home signals may be displayed by lights only. Two Position Home signals display two indications: STOP By day by the Arm horizontal or a Red light By night by the exhibit of a Red light. PROCEED By day by the Arm lowered 45° below horizontal or by a Green light At night by the exhibit of a Green light OFFICI  OFFICI AL FIXED SIGNALS – TWO POSITION DISTANT SIGNAL The Distant Signal indication advises the Train Driver that the Fixed signals applicable to the same line at the station/signal box are not at proceed and the train must proceed at a speed where the train is able to stop at the next fixed signal should the Home signal (next signal) be at stop. Once the home departure signal and the home signal(s) are at proceed the signalman can then place the distant to the proceed position, if either the home(s) or home departure or any signals are at stop the distant must remain in the normal position (caution). When the Train has passed the Distant signal at Caution the Home Signal may then be placed to proceed to allow the train to enter the station. OFFICI  OFFICI AL DISC SIGNAL The Disc signal works in the as follows 1. STOP – Red disc by day and Red light by Night 2. PROCEED – Disc turned to side by day and Green light at night OFFICI  OFFICI AL Disc Signals Disc and Dwarf signals are used to regulate the passage of trains between sidings, running lines and shunting operations The train must not pass a Disc or Dwarf signal displaying stop except as described under the rules and operating procedures Exceptions in Obeying Disc or Dwarf Signals Disc and Dwarf signals must not be passed at the stop position except 1. When the signal is defective and the signaller grants authority 2. When authorised by the pilot to enter the section where double line traffic is being worked over a single line during repairs or obstruction OFFICI  OFFICI AL FIXED SIGNALS – DWARF SIGNAL The Two Position signal works in the as follows 1. STOP – Painted semaphore arm horizontal, red light (night). 2. PROCEED – Painted semaphore arm 45deg, green light at night OFFICI  OFFICI AL Fixed Signals Three Position OFFICI  OFFICI AL Three position signals The three position Home signals can display up to seven aspects, namely:  Stop  Clear Normal Speed  Normal Speed Warning  Reduce to Medium Speed  Clear Medium Speed  Medium Speed Warning  Low Speed Caution. OFFICI  OFFICI AL NORMAL SPEED WARNING NORMAL SPEED WARNING By day:  top arm 45o above horizontal  bottom arm horizontal. By night:  top light yellow  bottom light red. The train may proceed at the maximum speed laid down for the Line section , but the Driver must be prepared to find the next fixed signal at STOP OFFICI  OFFICI AL CLEAR NORMAL SPEED CLEAR NORMAL SPEED By day:  top arm vertical  bottom arm horizontal. By night:  top light green  bottom light red. The train may proceed at the maximum speed laid down for the locality. The next signal could display a NORMAL SPEED or REDUCE TO MEDIUM SPEED aspect. OFFICI  OFFICI AL REDUCE TO MEDIUM SPEED REDUCE TO MEDIUM SPEED By day:  top arm 45o above horizontal  bottom arm vertical. By night:  top light yellow  bottom light green. The train may proceed at NORMAL SPEED but must reduce to MEDIUM SPEED (40 km/h) before passing the next fixed signal. However, after having passed the REDUCE TO MEDIUM SPEED signal, should the Driver observe the next signal in advance be displaying, or alter to an improved aspect (i.e. an aspect which permits NORMAL SPEED) the train speed may be regulated accordingly OFFICI  OFFICI AL CLEAR MEDIUM SPEED CLEAR MEDIUM SPEED By day:  top arm horizontal  bottom arm vertical. By night:  top light red  bottom light green. The train may proceed at MEDIUM SPEED (40 km/h). The signal in advance will be showing an aspect which permits medium or normal speed. A 40 km/h speed limit applies for the full track section. OFFICI  OFFICI AL MEDUIM SPEED WARNING MEDIUM SPEED WARNING By day:  top arm horizontal  bottom arm 45o above horizontal. By night:  top light red  bottom light yellow. The train may proceed at MEDIUM SPEED which applies for the full track section. The Driver must be prepared to stop at the next signal should it be at STOP. OFFICI  OFFICI AL Low Speed Caution LOW SPEED CAUTION Where it is necessary for low speed movements to be made past a three (3) position Home signal, a light is provided and fixed under the arms or lights. When a LOW SPEED aspect is required, a yellow light will be displayed directly under the semaphore arms or lights of the Home signal, This is termed LOW SPEED CAUTION. By day:  top arm horizontal  bottom arm horizontal  a yellow, LOW SPEED light under the arms. By night:  top light red  bottom light red  a yellow LOW SPEED light under two red lights. OFFICI  OFFICI AL Illuminated 65 or 80 on signal On some three position Home and Automatic signals an illuminated 65 or 80 may be exhibited with a REDUCE TO MEDIUM SPEED or CLEAR MEDIUM SPEED aspect. When the 65 or 80 is exhibited with a signal displaying the REDUCE TO MEDIUM SPEED aspect the speed of trains must not exceed the speed indicated at the next fixed signal should it be displaying a MEDIUM SPEED aspect with an illuminated 65 or 80. In most cases where an illuminated 65 or 80 is displayed with a MEDIUM SPEED signal aspect a diverging movement through points is set up. After having passed a signal displaying MEDIUM SPEED with an illuminated 65 or 80 the Driver must understand that a maximum speed of 65 or 80 km/h applies to the whole of the track section to the next fixed signal. OFFICI  OFFICI AL Three Position Automatic Signals Automatic Signals are operated by the passage of trains. Three position Automatic Signals have two staggered coloured lights. Three position Automatic Signals display the same aspects as Home Signals except there is no low-speed signal. Normal lights Marker light Note - Automatic Signals can only be passed at the Stop position by the Driver of the rail movement complying with Rule 1 of Section 3. OFFICI  OFFICI AL Rule 1 Section 3 - Passing Automatic Signals at Stop Passing Automatic Signal at Stop The Driver must bring the train to a stand if an Automatic Signal displays Stop. The Driver must then contact 53599 (9610 3599) and listen to the automated message and upon completion of the message, the Driver will then be prompted to provide the following information:  1. The Driver’s name,  2. The Train Describer Number,  3. The lead number of the rail vehicle the Driver is operating, and  4. The number of the Automatic Signal at Stop. The automated voice mail message will state: ‘After satisfying yourself that it is safe to pass the Automatic Signal at the Stop position, you may pass the Automatic Signal in question, but in doing so, only at a speed of Extreme Caution. You must be prepared to stop within half the distance which can be seen ahead, always being prepared to find the section ahead occupied or obstructed, or the track damaged. A maximum speed of 25 km/h must not be exceeded’. OFFICI  OFFICI AL Rule 1 Section 3 - Passing Automatic Signals at Stop Automatic Signal still at Stop If the Automatic Signal is still at Stop after completing the transmission, the Driver may then proceed, but must control the speed of the train at Extreme Caution. The train must be operated at Extreme Caution up to the next Fixed Signal and then proceed in accordance with the signal indication displayed. The speed of the train must not be increased until the whole of the train has passed that Fixed Signal. Extreme Caution is defined as being able to stop the train in half the distance that can be seen ahead, not exceeding 25 km/h or the posted track speed if that is the lesser, and always being prepared to find the section ahead occupied or obstructed, or the track damaged. For example, if the Driver can only see 50 metres ahead, the speed travelled must be suitable for the Driver to stop the train within 25 metres. Except where special instructions are issued to the contrary or where a disabled train requires assistance, a Driver must not pass any Automatic Signal when it is known there is a train in the track section ahead. OFFICI  OFFICI AL Rule 1 Section 3 - Passing Automatic Signals at Stop The Driver must not: Pass the signal if the line ahead is known or seen to be occupied, until the train ahead moves out of sight or out of the track section, Assume that the signal being passed is defective, but must always consider the track section ahead is occupied, obstructed or damaged, Be distracted whilst the train is in motion. The Driver must bring the train to a stand before performing any other function, Pass the signal unless the Driver can exercise full control of the train. If the Driver considers it is unsafe, because of: The braking ability of the train in consideration of the gradient to be travelled, Defective or isolated equipment, Extremely bad weather conditions, Poor visibility, Restricted visibility, Fog The Driver does not have to pass the signal at Stop until the signal alters to a Proceed indication, or until it is safe to do so. The Driver must advise the relevant Train Control Centre of the reasons for not proceeding. At no time is a Signaller, Train Controller or any other person permitted to indicate to a Driver that an Automatic Signal is defective when it is at Stop. OFFICI  OFFICI AL Rule 1 Section 3 - Passing Automatic Signals at Stop Driver being prepared to Stop Should the next signal in advance be a Proceed, the Driver must be prepared to stop short of any obstruction. The speed of the train must not be increased until the whole of the train clears that signal. Automatic Signal clears If the Automatic Signal clears during the transmission of the information in clause (a) p1, 2 & 3 above, the Driver must state ‘Signal Cleared´ upon receiving the prompt and complete the call. The Driver may then proceed in accordance with the signal indication displayed. OFFICI  OFFICI AL Rule 1 Section 3 - Passing Automatic Signals at Stop Driver unable to make contact Should the Driver be unable to make contact with 53599 (9610 3599) due to a technical fault, the Driver may proceed in accordance with clause (b) above once a period of thirty seconds has elapsed. The Driver must advise the relevant Train Control Centre of the inability to make contact at the first available opportunity. Except where special instructions are issued to the contrary or where a disabled train requires assistance, a Driver must not pass any Automatic Signal when it is known there is a train in the track section ahead. OFFICI  OFFICI AL Rule 1 Section 3 - Passing Automatic Signals at Stop Parallel Lines If the Driver sees a train in advance where there are parallel lines, the Driver must stop until it is ascertained that the train is on a parallel line. Two Trains in the same section After entering a section, if a Driver sees the preceding train there, the train must be brought to a stand and must wait until the first train has proceeded on its journey unless authorised by the Train Crew of the first train to move cautiously forward. After the first train has proceeded, the Driver of the second train may follow at a distance in order to avoid colliding with the first train in the event it stops. The Driver must bring the train to a stand at the next signal if that signal is at Stop. Radios should be used for communication between Drivers and if available, hand signals must also be used. OFFICI  OFFICI AL Rule 1 Section 3 - Passing Automatic Signals at Stop Next Automatic Signal If the next signal is an Automatic Signal and is at Stop, the procedures laid down in this rule will apply. Active Level Crossings Where a level crossing equipped with boom barriers or flashing lights is in a track section and the equipment is not working, the Driver must move cautiously forward until the boom barriers and/or flashing lights are operated by the passage of the train. The train must not proceed over the level crossing until the level crossing equipment is operating and it is safe to do so. The Driver must use the whistle frequently. OFFICI  OFFICI AL Rule 1 Section 3 - Passing Automatic Signals at Stop Train Stopped at Two Position Automatic Signal protecting a Level Crossing Where the signal protects a level crossing equipped with boom barriers or flashing lights in a: Train Order Single Line section Train Staff section And the Two Position Automatic Signal displays a Stop indication, the Driver must comply with clauses (a), (b), (c) & (d) as above for passing the Automatic Signal at Stop. The Driver may move cautiously forward until the boom barriers and/or flashing lights are operated by the passage of the train. The train must not proceed over the level crossing until the level crossing equipment is operating and it is safe to do so. The Driver must use the whistle frequently. The Driver may then resume normal speed after passing over the level crossing. OFFICI  OFFICI AL Rule 1 Section 3 - Passing Automatic Signals at Stop Rail Traffic Movements operating within Defined Worksite Limits Where a Rail Traffic movement is operating within the defined worksite limits of: 1. Absolute Occupation 2. Booked out track 3. A permit to foul the line 4. Track Warrant Working 5. Track Force protection The following process must be observed. The Track Force Protection Coordinator must contact 53599 (9610 3599) and listen to the automated message. Upon completion of the message, the Track Force Protection Coordinator must provide the following information:  1. The Track Force Protection Coordinator’s name,  2. The number of the Absolute Occupation circular, and  3. The number of the Automatic Signal at Stop. Where multiple rail traffic movements may be required, the above information need only be provided on the first occasion on which it is necessary for an Automatic Signal to be passed at Stop. OFFICI  OFFICI AL 3 Position Dwarf Signals Three position Dwarf Signals use lights Stop is indicated by a red, purple or blue light. Low Speed Caution is indicated by a yellow light. Clear Low Speed is indicated by a green light. OFFICI  OFFICI AL 3 Position Dwarf Signals Clear Low Speed: Dwarf Signal When Clear Low Speed is displayed it indicates the following: The points are set for the movement The line is clear to the next fixed signal. The next fixed signal is at `Proceed' The speed of the train must not exceed 15 km/h. When a low speed signal is displayed, the speed restriction applies to the whole section up to the next fixed signal. OFFICI  OFFICI AL Defined Station Limits ‘Station Limits’ within the various Safeworking systems is defined as follows: OFFICI  OFFICI AL Hand Signals These Hand signals are made using flags by day and with lamps by night or during inclement weather. A red flag or red light denotes 'Stop'. In the absence of a red light any light waved violently denotes 'Stop’. Hand Signals and Fixed Signals The fixed signal must always be used where one is provided; hand signals must not be used or accepted instead of an operational fixed signal, except in case of danger. When a hand signal is necessary, it must be given from a clear position so there cannot be any misunderstanding by the Driver or others of the intention of the signal and to which train it refers. Where a hand signal is to be given from the Signalbox, the Signaller must always exhibit a hand signal from outside the Signalbox, either by flag or lamp. OFFICI  OFFICI AL Hand Signals Hand Signals – Lamps & Flags Signallers must always have hand signal lamps ready for use from dusk to clear daylight and during inclement weather, and Flags (Red & Green) from clear daylight to dusk. Hand lamps and flags, when used as signals, must always be held in the hand and not put on or stuck into the ground, except where they are used for the purpose of marking the actual point of obstruction. Train Controllers do not use Hand Signals or Radio Signals as part of NOTE duties, this is a requirement for Signallers at Signalboxes, Train Crews Shunters and Track Maintenance qualified Workers OFFICI  OFFICI AL Radio Signals Where radios are used for shunting operations, the Competent Worker in charge of the shunt must be ready to give any necessary hand signals and the Driver must be ready to receive hand signals. When a shunting operation is commenced using radio it should be completed using radio. Except in an emergency the method of shunting must not change from hand signals to radio, or from radio to hand signals, without first stopping the shunt, informing the Driver of the changed procedure and receiving confirmation from the Driver of the change. Use of Radios The Competent Worker in charge of the shunt must frequently speak to the Driver during shunting operations using the radio. If the Driver does not receive a regular transmission in accordance with the requirements of the shunt, the movement must be stopped until a clear understanding is reached with the Competent Worker controlling the movement. If in any doubt regarding the safety of the movement, the Driver must stop the movement and assess the situation. Failure of Radios If the radio being used by the Driver or Competent Worker fails, hand signals are to be adopted until replacement/s are available. Train Controllers do not use Hand Signals or Radio Signals as part of NOTE duties, this is a requirement for Signallers at Signalboxes, Train Crews Shunters and Track Maintenance qualified Workers OFFICI  OFFICI AL Banner Indications A Banner Indicator may be provided in the rear of a Home Signal or an Automatic Signal to provide the Driver with an early indication of the signal indication displayed on the next Fixed Signal. Banner indicators are not Fixed Signals and are not to be considered as the Signal in advance when passing a defective signal or as the Signal in the rear when protecting a disabled train. https://www.youtube.com/watch?v=AFezKquIBkk#:~:text=Banner%20Indicators%20are%20 used%20in,because%20of%20a%20tight%20curve. Failure of a Banner Indicator Should one or both Indicators fail to display an indication the Banner Indicator must be considered defective. The Driver must consider that the next Fixed Signal is displaying a Stop indication and regulate the speed of the train accordingly. The Driver must report the fault and the number of the defective Banner Indicator to the Train Controller. OFFICI  OFFICI AL Illuminated Letter A - Three Position Home Signal At some locations provision is made for the location to switch out for a period of time. The signal box is then unattended and is termed a switched out signal box. At these locations the Home signal that protects the crossover track or entrance to a siding will be worked as a Home or Automatic signal, according to requirements. When the signal box is switched out the points are set and secured for the running lines so that trains can pass through the unattended location. The Home signals applicable to trains running through the switched out location work automatically. To distinguish three position Home signals which are to be treated as Automatic signals when a signal box is switched out, an illuminated letter A is displayed on the post of the signal when the signal is at STOP. When the Home signal displays the illuminated letter A it must be treated as an Automatic signal and a Driver may pass such signal in accordance with the instructions concerning Automatic signals at STOP OFFICI  OFFICI AL FIXED SIGNALS – THREE POSITION SIGNAL INDICATIONS Signal indication and meaning Signal Diagram NORMAL SPEED WARNING – (YELLOW over RED) Indicated by a yellow light above a red light. When "Normal Speed Warning" is displayed the driver must be ready to stop at the next signal. CLEAR NORMAL SPEED – (GREEN over RED) Indicated by a green light above a red light. When "Clear Normal Speed" is displayed the driver can expect the next signal at proceed and may proceed at the maximum speed allowed for the line. CLEAR MEDIUM SPEED – (RED over GREEN) Indicated by a green light below a red light. When "Clear Medium Speed" is displayed the driver must not exceed 40 km/h and can expect the next signal at proceed. When medium speed signal is displayed the speed restriction applies to the whole section up to the next signal, except in ATC where the speed restriction only applies till the rear of the train is clear of the Points. OFFICI  OFFICI AL FIXED SIGNALS – THREE POSITION SIGNAL INDICATIONS Signal indication and meaning Signal Diagram MEDIUM SPEED WARNING – (RED over YELLOW) Indicated by a yellow light below a red light When "Medium Speed Warning" is displayed the Driver may proceed at medium speed and must be prepared to stop at the next signal. When medium speed signal is displayed the speed restriction applies to the whole section up to the next signal. REDUCE TO MEDIUM SPEED – (YELLOW over green) Indicated by a yellow light above a green light. When "Reduce to Medium Speed" is displayed the driver may proceed at normal speed but must reduce to medium speed (40 km/h) before the next signal. If after passing "Reduce to Medium Speed" the driver observes the next signal is displaying an improved aspect such as normal speed, the driver may regulate the speed to the aspect of that signal. LOW SPEED CAUTION – (RED over RED over YELLOW) Indicated by a yellow light below two red lights. When the "Low Speed Caution" is displayed it indicates that the points are set in the correct position for the driver to proceed. It does not indicate the line is unoccupied. The driver must be prepared to stop short of any obstruction. The speed of the train must not exceed 15 km/h. OFFICI  OFFICI AL FIXED SIGNALS – THREE POSITION SIGNAL INDICATIONS OFFICI  OFFICI AL Defective Signals OFFICI  OFFICI AL Note: The Safeworking Manager must be informed when the defective signal cannot be secured at Stop or the most restrictive aspect. The Signaller/Train Controller must apply Blocking Facilities to prevent rail traffic from approaching the defective signal until authorised by the Safeworking Manager. The Safeworking Manager will determine any additional safety measures required for the safe operation of trains OFFICI  OFFICI AL Incorrectly displayed Signals The following incorrectly displayed signals must be considered as defective and treated at their most restrictive aspect when: 1. The absence of a signal when usually present 2. A signal aspect imperfectly displayed 3. Presence of a light lights where a red, purple, green or yellow light should be shown 4. Exhibition of two signals to proceed where only one such signal should be displayed 5. Conflicting aspects exhibited by co-acting signals Signal Most restrictive aspect Home Stop Automatic Stop Dwarf Stop Distant Caution Repeating Warning OFFICI  OFFICI AL Issue of Caution Orders The Train Controller / Signaller must not issue more than one Caution Order for the same signal at a time. And before issuing another Caution order must wait until the track section ahead is clear. In the case of a Home Signal leading to the entry to a Block Section then not until that Block Section is clear. Each Caution Order is only to be issued for One Signal Separate Caution Orders are to be issued for each successive Home Signal on arrival at that signal Safeworking Circular SW.0094/2017 OFFICI