Knowledge (XXG)

Swiss railway signalling

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957: 945: 545: 475: 488: 580: 516: 574: 532: 503: 460: 447: 565: 526: 497: 469: 593: 921: 441: 637: 161: 933: 966: 22: 715: 886:. There is always, except immediately after a station, a sign indicating the speed restriction of the section in advance, followed by the speed restriction sign itself and then a final signal that ends the speed restriction. When several speeds are shown, the lower one still applies to trains of higher category and the upper one to the lower category. 227:
proceed at a speed slow enough that they may stop short of any obstruction de 40 km/h. This restrictive procedure requires very slow operation. There is a complementary signal, shown below, which gives the order 'Proceed on sight' without needing a written order, so as to avoid huge delays in case a signal breaks down.
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has been developed. The signal can then be presented on the same plate is a distant signal (warning or announcement of speed), an image of the home signal (track clear, stop or speed limit). To be recognized as a home signal, where the alignment of the lamps would not allow, the combined signal has a
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Auxiliary signals are used to send permission to pass a signal which has failed or is showing the 'stop' aspect. This avoids the use of formal orders which would delay trains too much. An auxiliary signal allows the driver to proceed at sight without needing communication between the driver and the
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A signal presenting the 'stop' aspect cannot be passed under any circumstances without a formal order from the train controller. This order can be transmitted in writing or by radio. In the latter case the driver must repeat the order word for word. Once this order has been received, the driver can
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The speed reductions imposed by type L signals, when they are protecting a station or a crossover, only apply to the points zone protected by the signal and not normally to the stretch of track beyond the points. Thus if a signal presents the aspect 2 (maximum speed 40 km/h at the signal), the
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In the example presented on the left, at the top is an advance warning for a speed restricted section, in the middle the sign to start the speed restriction and below the sign to end the speed restriction and return to normal speed. There are also round speed restriction signs, with orange or green
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A grouped signal is an L type signal which applies to several tracks, usually in stations. The rules covering the presence of several trains waiting at a grouped signal dictate that the traffic controller must indicate to all trains that the signal will pass to 'go' and that they must not start.
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Speed signalling is no longer based on combinations of green and yellow, but on one colour accompanied by a single digit display indicating the speed. Thus the green aspect means 'track clear' and if a digit is displayed, with a speed restriction. The yellow aspect still means a warning or a speed
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In Switzerland, the speed of a section is indicated on the route instructions a document that the driver uses to know the speed limits for each part of the route he uses. However, the curves to be negotiated at low speed are indicated by signs and are only mentioned in the route instructions. The
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Dwarf signals are usually positioned on the left of the tracks and only apply to that track. In case it is positioned on the right hand side of the track it has an illuminated indicator (arrow) to make clear for which track it is valid. They are set to allow the passage of trains as well as the
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In Switzerland, shunting manoeuvres can be controlled either by shunting signals or dwarf signals. The maximum speed allowed for shunting is 30 km/h. This can be increased in special cases to 40 km/h. In any case speed must be compatible with visibility, local conditions and braking
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An illuminated numeric display is used to indicate which track is concerned by the signal, track 1 always being the one closest to the station building. Trains standing on other tracks know that this signal implies the 'halt' aspect for their tracks. 'Track free' indicators are also used which
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40 km/h limit applies from the signal and over the points concerned. ; as soon as the train has passed the last points in deviated position it can accelerate to the operating speed. This way of operating requires that the drivers understand for any signal which points are concerned.
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project and shows a clear influence of the Dutch NS'54 system. In contrast to the latter the type N uses the 3 coloured lights in a triangular position, whereas the Dutch system positions them in a vertical line. There are more differences, mainly signalling an occupied section of track to the
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In contrast to L type signals, not all N type home signals are preceded by a distant signal, as all N signals are capable of speed signalling and thus play the role of a distant signal. Thus, if a driver passes an N type signal showing a speed aspect, he must maintain this speed until he has
797: 212: 203:(SBB) are progressively replacing L type signals by N type signals, because N type signals are more complete, better adapted to high speed operation (>140 km/h), allowing greater fluidity and thus increasing capacity. Most other Swiss railway companies only use L type signals. 674: 315: 271: 293: 659: 909: 848:
to the driver. He will then know that boarding is complete, the doors are closed and that he may depart. This signal is actuated by the guard just before boarding himself. These signals are to be found along the platform and sometimes at the departure signal.
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In combined L-type signals the distant signal ‘track clear’ is not shown but implied by the ‘proceed’ aspect. If two successive signals show speed limits, the first speed limit shown must be applied from the second signal, even if not shown explicitly.
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According to the rules, light signals are used for main line traffic or shunting. N and L type signals are used for main line traffic and are not to be taken account of during shunting. Shunting signals do not apply to main line movements.
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Shunting signals are older technology and comprise fewer safety features. They control shunting paths and are not fitted with interlocks,. The driver must therefore ensure that points are set correctly through their intended path.
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Whatever kind of signal is used, the permission to move is given to the guard in charge who will then himself authorize the movement to start. This is to avoid accidents to the team who may be working on a vehicle.
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Other signals include, for example, an indication that a passenger has requested a stop at a request stop, the voltage in a variable voltage section or an order to test the brakes.
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In some cases, mostly entering stations, home signals and distant signals can be found on the same mast; in this case the distant signal is linked to the next home signal.
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Signalling is governed by strict rules, released by the Federal Office of Transport. The rules for railway operation are laid out in the Swiss Rail Service Regulations (
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indicate which aspect applies to track where the indicator is installed. In this example, the driver knows that the signal with aspect 2 permits him to start.
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restriction if a digit is displayed and a red aspect remains an absolute stop signal, only to be passed with a formal order or with safety equipment deployed.
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Complementary signals are mostly used with type L signals, but some are used with type N. They can also be independent of either type. Mostly they are used
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In contrast to shunting signals, dwarf signals protect paths and are interlocked. Points in zones equipped with dwarf signals do not have points indicators.
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There are many types of complementary light signals to be found on the Swiss Federal Railways network. Only the most common ones will be shown here.
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L type signals remain the most widespread in the country. It authorizes trains to proceed at their normal speed, to slow them down or to stop them.
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systems used in Switzerland by the different railway companies. There are two main types of signal, used up to 160 km/h, above which speed
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In sidings where there are no signals and the points are operated manually, orders are given by hand signals, acoustic signals or by radio.
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N type signals are progressively replacing L type signals on the CFF/SBB network and are starting to be used by other companies, mostly the
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Swiss light signals are divided into two classes, recognizable by the difference in shape of the signal: type L (for Light) and type N (for
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equipment, though can be found as an upright rectangle on the switch signal when it is pointed onto the track where the OLE ends:
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There are a number of signs that are all designed to protect or to indicate a fixed feature such as a speed restriction or a
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Start of a neutral zone; without electric power. Electric locomotives must open the main circuit breaker before this sign.
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In order to distinguish clearly between the two, distant signals use square plates while home signals use circular plates.
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End of a neutral zone; without electric power. Electric locomotives may close the main circuit breaker after this sign.
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standard light signals for mainline movements. The last dwarf signal before entering the main line will show a
1604: 836: 257: : The track ahead is clear. The train is permitted to travel at any speed up to the current line limit. 1771: 1569: 1554: 1312: 1284: 1104: 540:, speed limit 40 km/h, the next section is obstructed and the driver must be ready to halt the train. 189: 1549: 1539: 1488: 1407: 1402: 1132: 950:
End of Overhead Line Electrification; Electric locomotives must not pass this sign. Usually placed on the
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Signs are used to protect or indicate a fixed feature such as a speed limit or a level crossing.
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circumference, which apply only to tilting trains. These signals operate on the same principle.
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Shunt limit; Shunting trains may not pass this sign. Usually found near yards and stations.
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recognized the aspect of the next signal, which may continue to impose a speed restriction.
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to communicate orders and information which cannot be communicated with standard signals
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https://www.styria-mobile.at/home/Austro-SwissRailwaySignalling/asr/ensigchbegriff.html
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or ZUB 121, so locomotives only used for shunting are not equipped with these systems.
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Shunting signals are not integrated with automatic train protection systems such as
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Horn/Whistle sign; Drivers shall blow their horn/whistle when passing this sign
667:: The driver must halt before the signal or the points protected by the signal. 185: 21: 1584: 1457: 1422: 1180: 118:
Railway signalling systems used in Switzerland by different railway companies
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Shunting signals can protect one or more sets of points within a zone.
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to mitigate difficulties caused by the use of replacement equipment
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Many other signs exist of which a small sample are shown here:
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This system is rather slow, so complementary signals are used.
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On lines where the blocks are relatively close a system called
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The train which has not received this order is free to depart.
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Shunting allowed for the area defined by local prescriptions
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to the displayed digit x 10 km/h (here 70 km/h)
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The auxiliary signal for N type signals is flashing red.
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In some stations, signals are needed to communicate the
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In both systems, as is true elsewhere in the world, a
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Example of a 'slow' instruction to the required speed
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Unsourced material may be challenged and removed. 788:Complementary signals for grouped L type signals 150:Prescrizioni sulla circolazione dei treni (PCT) 1081: 882:signs for these speed restrictions are called 184:tells the driver the aspect of the following 146:Prescriptions de circulation des trains (PCT) 8: 1393:Interoperable Communications Based Signaling 777:to solve problems posed by grouped L signals 1328:Automatic Train Protection (United Kingdom) 1088: 1074: 1066: 106:Learn how and when to remove this message 362: : Trains must stop at home signal 1293:Advanced Civil Speed Enforcement System 994: 1453:Train Protection & Warning System 815:Auxiliary signal illuminated beneath. 7: 1186:Integrated Electronic Control Centre 682:: The driver may start or continue. 44:adding citations to reliable sources 1448:Train automatic stopping controller 1368:Continuous Automatic Warning System 699:Dwarf signals have three aspects: 1128:Communications-based train control 14: 1798:Railway signalling in Switzerland 385:distinctive supplementary plate. 164:Example of an L type light signal 964: 955: 943: 931: 919: 907: 758:aspect for a shunting movement. 713: 672: 657: 635: 591: 578: 572: 563: 543: 530: 524: 514: 501: 495: 486: 473: 467: 458: 445: 439: 365: 352: 343: 326: 313: 304: 291: 282: 269: 260: 247: 20: 1610:Westinghouse Brake & Signal 1373:ContrĂŽle de vitesse par balises 1239:North American railroad signals 31:needs additional citations for 1468:Transmission balise-locomotive 1433:Sistema Controllo Marcia Treno 1343:Automatische treinbeĂŻnvloeding 1229:Application of railway signals 1003:"Fahrdienstvorschriften (FDV)" 1: 1418:Punktförmige Zugbeeinflussung 1138:European Train Control System 680:OK to start shunting movement 1358:Chinese Train Control System 1148:Radio Electronic Token Block 1123:Centralized traffic control 1028:"Eisenbahnverordnung (EBV)" 832:Other complementary signals 766:Complementary light signals 1814: 1323:Automatic train protection 55:"Swiss railway signalling" 1615:Westinghouse Rail Systems 1473:Transmission Voie-Machine 1318:Automatic train operation 1270:Track circuit interrupter 1118:Automatic block signaling 1113:Absolute block signalling 1051:PCT R300.4, chiffre 3.6.1 884:'low speed section signs' 735: 727: 719: 712: 704: 455:, proceed at line speed. 427: 1413:Pulse code cab signaling 1338:Automatic Warning System 1244:Railway semaphore signal 1206:Solid State Interlocking 754:aspect for a train or a 122:Swiss railway signalling 1313:Automatic train control 800:Example of group signal 509:Obstruction close ahead 376:Combined L Type(K type) 1489:Level crossing signals 1408:Positive Train Control 1403:Linienzugbeeinflussung 1133:Direct traffic control 1060:PCT R300.1, dĂ©finition 878: 841: 816: 801: 665:Stop shunting movement 393: 216: 201:Swiss Federal Railways 165: 142:Fahrdienstvorschriften 1211:Westlock Interlocking 1201:Rail operating centre 1163:Train order operation 1158:Track Warrant Control 876: 839: 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"Swiss railway signalling"
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railway signalling
cab signalling

Rail 2000
distant signal
home signal
block system
Swiss Federal Railways

Signal présentant deux feux vert en diagonale sur un carré noir
Signal présentant un feu vert sur un signal oblongue allongé
Signal présentant un feux orange en haut à gauche et un feux vert au milieu à droite,le tout sur un carré noir
Signal présentant un feu vert en dessus d'un feu orange sur un signal oblongue noir allongé
Signal présentant un feu orange en haut à gauche et deux feux verts en diagonale, le tout sur un carré noir
Signal présentant deux feux verts verticaux sur une forme oblongue allongée noir
Signal présentant deux feux verts en diagonale et un autre feu orange en bas à droite, le tout sur un carré noir
Signal présentant trois feux verts verticaux sur une forme oblongue allongée noire
Signal présentant deux feux orange verticaux sur une forme oblongue allongée noir
Signal présentant deux feux orange en haut sur un carré noir

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