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Sometimes a track is located between two other tracks that are converging, and there is nowhere for a catchpoint to divert a train to. In such cases, a pair of single catchpoints of left and right hand may be provided to derail the overrunning train without directing it to either side. The two
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have switches that work in opposite directions and are therefore either both open or both closed. Vehicles derailed at these points will tend to continue in a forward direction rather than being thrown to one side. Wide to gauge points are typically found on sidings situated between running
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A cheap and simple alternative to catch points or a derail is a chock block, which is a piece of timber that can be positioned and locked over one of the rails at the end of a siding to protect the main line from runaways. In order for the siding to be used the chock block must be removed.
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are a kind of wide to gauge switch which are part of two separate crossovers. There are three positions: part of crossover A to left; wide to gauge switches; part of crossover B to right. A good place to view these independent switches are at both ends of
Platforms 1 and 2 at
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turnout is used to prevent any unauthorised movement that may otherwise obstruct the main line. The trap points also prevent any damage that may be done by a vehicle passing over points not set for traffic joining the main line. In the
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Because catch points are rarely needed, it is not always clear whether they will in fact derail a runaway train effectively and as safely as possible. For example, use of catch points to derail a train that had
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Trap points should preferably be positioned to ensure that any unauthorised vehicle is stopped a safe distance from the main line. However, due to space limitations, it is not always possible to guarantee this.
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443:(or "catch") any unauthorised vehicles travelling down the gradient. This may simply be a vehicle that has accidentally been allowed to run away down the slope, or could be a wagon that has
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are double trap points where the tongues of rail are longer, so that the trap point rail nearest the main line continues over the siding rail with a common crossing or frog.
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is used to make sure that the signal cannot be set to allow passage onto the main line until the trap points have been aligned to ensure this movement can take place.
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point blades are held in a position to derail any vehicle travelling downhill. However, any traffic travelling in the correct (uphill) direction can pass over the
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or other granular material, or a siding where the rails are within sand-filled troughs. This method of stopping a vehicle travelling at speed is preferred over a
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safely, pushing the switch blades into the appropriate position. Once the wheels have passed, the catch points are forced back into the derailing position by
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accident investigation image of a cement wagon derailed by trap points at
Clitheroe, 9 March 2020, successfully protecting the adjacent running lines (left)
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consists of only one switch rail, leading away from the main line to a short tongue of rail. This is usually placed in the rail farthest from the main line.
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will be fitted to one of the run-off rails. When a train runs off it will break the track circuit and set main line signals to 'danger'.
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passed a red signal as well as catch points, leading to the train going down the embankment, injuring the two crew on board.
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controlling passage onto a main line is set to "danger", the trap points are set to derail any vehicle passing that signal.
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Trap points and a sand drag (left) and catch points (right) protect the entrance to a single track on a steep grade.
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are a full turnout, leading to two tongues. Usually the tongue nearer the main line is longer than the other.
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from its train. In either case, the runaway vehicle could collide with a train farther down the slope.
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is a short dead-end siding leading to some method of stopping a vehicle, such as a sand drag or
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762:"Paddington station train derailment: Fire brigade called in as incident causes travel chaos"
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608:, June 2016. The train suffered severe damage to the rear driving unit and also damaged a
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Diagram showing the use of trap points to protect the main line at the exit of a siding
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blades of an ordinary turnout may also be operated separately for the same purpose.
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705:"Glossary of Signalling Terms, Railway Group Guidance Note GK/GN0802, Issue One"
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stanchion, causing all services to and from the station to be halted for hours.
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749:(4th edition (1971) ed.). The Permanent Way Institution. pp. 150–152.
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and a wagon or train using the catchpoint could foul an adjacent line, then a
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from a dangerous route onto a separate, safer track. Catch points are used to
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is another device used for the same purposes as catch and trap points.
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In some cases, catch points and trap points direct vehicles into a
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Examples would be the north and south ends of platforms 1 and 2 at
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707:. Rail Safety and Standards Board (UK). April 2004. Archived from
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The type of trap points to be used depends on factors such as the
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There are several different ways of constructing trap points:
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British
Railway Track: Design, Construction and Maintenance
521:"Sand drag" redirects here. For off-road drag racing, see
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A trap road with buffer stops at the railway station of
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Illustrated explanation of catch points at
Springwell
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station in June 2016 resulted in the empty train, a
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172:) on steep slopes. Trap points are used to protect
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473:The use of catch points became widespread in the
246:An unauthorised movement may be due to a runaway
176:from unauthorised vehicles moving onto them from
234:or where a secondary track joins a main line. A
454:or a single switch blade. In some cases, on a
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787:"Derailment of a freight train at Carrbridge"
604:that was derailed by a set of trap points at
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1675:Interoperable Communications Based Signaling
367:at the exit of Stoke Gifford Rail Yard near
166:vehicles which are out of control (known as
1610:Automatic Train Protection (United Kingdom)
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458:that is only traversed by uphill traffic,
828:Steam locomotive derailed by catch points
120:Learn how and when to remove this message
481:(1868), where runaway wagons containing
1575:Advanced Civil Speed Enforcement System
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350:
435:are used where track follows a rising
1735:Train Protection & Warning System
27:Railway points used as safety devices
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1468:Integrated Electronic Control Centre
629:, hitting and severely damaging an
58:adding citations to reliable sources
1730:Train automatic stopping controller
1650:Continuous Automatic Warning System
450:Catch points may consist of a full
403:Nuremberg–Munich high-speed railway
1410:Communications-based train control
363:Double trap points protecting the
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641:In 2010, in snowy conditions, at
542:Honoré-Beaugrand station terminus
834:— video footage on YouTube
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1892:Westinghouse Brake & Signal
1655:ContrĂ´le de vitesse par balises
1521:North American railroad signals
369:Bristol Parkway railway station
45:needs additional citations for
1750:Transmission balise-locomotive
1715:Sistema Controllo Marcia Treno
1625:Automatische treinbeĂŻnvloeding
1511:Application of railway signals
158:devices. Both work by guiding
1:
1700:Punktförmige Zugbeeinflussung
1420:European Train Control System
631:overhead line electrification
563:simply leading to a mound of
230:are found at the exit from a
1640:Chinese Train Control System
1430:Radio Electronic Token Block
485:(kerosene) collided with an
160:railway carriages and trucks
1405:Centralized traffic control
555:, also sometimes called an
491:continuous automatic brakes
384:Castle Cary railway station
331:of the siding, and whether
303:Trap points with a crossing
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1605:Automatic train protection
1068:Transfer table (traverser)
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497:Wide to gauge catch points
252:passing a signal at danger
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1755:Transmission Voie-Machine
1600:Automatic train operation
1552:Track circuit interrupter
1400:Automatic block signaling
1395:Absolute block signalling
1056:ground-level power supply
619:passed a signal at danger
606:London Paddington station
579:to the vehicle involved.
320:Wide to gauge trap points
275:track circuit interrupter
221:track circuit interrupter
1695:Pulse code cab signaling
1620:Automatic Warning System
1526:Railway semaphore signal
1488:Solid State Interlocking
681:(RSA/RESA) for airplanes
1595:Automatic train control
1041:Railway electrification
532:View of a track from a
345:Hornsby railway station
1771:Level crossing signals
1690:Positive Train Control
1685:Linienzugbeeinflussung
1415:Direct traffic control
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2085:Railway track layouts
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1483:Rail operating centre
1445:Train order operation
1440:Track Warrant Control
1180:Platform screen doors
832:Great Central Railway
612:by colliding with it.
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365:South Wales Main Line
223:fitted to trap points
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1615:Automatic train stop
1130:Anti-trespass panels
745:D. H. Coombs (ed.).
416:Trap point in France
352:Types of trap points
340:Independent switches
310:trap road with stops
250:, or may be a train
54:improve this article
977:Classification yard
439:. They are used to
1455:Signalling control
1379:Railway signalling
1236:Motive power depot
1190:Signalling control
821:2005-05-09 at the
679:Runway safety area
674:Runaway truck ramp
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1827:General Electric
1764:Crossing signals
1645:Cityflo 650 CBTC
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1547:Track circuit
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1083:refuge siding
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1029:tramway track
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714:on 2016-01-29
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669:Runaway train
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592:Effectiveness
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553:safety siding
550:
543:
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487:express train
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190:safety siding
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151:which act as
150:
147:are types of
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88:
85:
81:
78:
74:
71: –
70:
66:
65:Find sources:
59:
55:
49:
48:
43:This article
41:
37:
32:
31:
19:
1887:Union Switch
1791:Wayside horn
1635:Catch points
1634:
1542:Axle counter
1473:Interlocking
1425:Moving block
1215:Wayside horn
1165:Interlocking
1145:Catch points
1144:
1105:Water trough
1007:Passing loop
987:Pocket track
972:Balloon loop
936:Ladder track
795:. Retrieved
790:
781:
769:. Retrieved
765:
755:
746:
716:. Retrieved
709:the original
640:
615:
586:
557:arrestor bed
556:
552:
548:
546:
533:
504:
500:
483:paraffin oil
472:
449:
433:Catch points
432:
431:
398:
339:
326:
319:
309:
302:
296:
290:
284:
268:
264:
260:Interlocking
245:
227:
226:
194:
189:
185:
182:branch lines
168:
144:
141:Catch points
140:
139:
116:
107:
97:
90:
83:
76:
64:
52:Please help
47:verification
44:
2049:Switzerland
2024:New Zealand
2019:Netherlands
1725:Slide fence
1478:Lever frame
1140:Buffer stop
1100:Water crane
1012:Track gauge
951:Tie/Sleeper
659:Buffer stop
583:Chock block
573:buffer stop
540:beyond the
523:Drag racing
333:locomotives
314:buffer stop
228:Trap points
203:Trap points
145:trap points
18:Trap points
2074:Categories
1957:By country
1740:Train stop
1705:RS4 Codici
1463:Block post
1313:Industrial
1297:Water stop
1258:for trains
1250:Roundhouse
1224:Structures
1210:Train stop
1160:Guard rail
1135:Block post
1123:and safety
1120:Signalling
1051:third rail
1024:Rail track
1017:dual gauge
901:Baulk road
718:2007-02-18
686:References
643:Carrbridge
477:after the
399:Allersberg
110:April 2017
80:newspapers
1964:Australia
1817:AŽD Praha
1776:Crossbuck
1680:Crocodile
1263:for goods
1205:Tell-tale
1036:Rail yard
1002:Guide bar
982:Headshunt
965:Trackwork
931:Fishplate
921:Date nail
882:(history)
637:Accidents
627:Class 165
610:stanchion
549:sand drag
536:, in the
534:sand drag
517:Sand drag
445:decoupled
401:, on the
347:, Sydney.
254:. When a
186:sand drag
2054:Thailand
1862:Safetran
1852:Magnetic
1837:Griswold
1786:E-signal
1318:Military
1275:building
1245:Platform
1155:Derailer
1073:Roll way
992:Junction
891:Axe ties
819:Archived
653:See also
647:Class 66
460:trailing
437:gradient
329:gradient
169:runaways
1999:Germany
1989:Finland
1974:Belgium
1969:Bavaria
1872:Siemens
1847:Hitachi
1822:Federal
1807:Adtranz
1710:SelTrac
1557:Treadle
1503:Signals
1328:station
1323:Private
1270:Station
946:Profile
896:Ballast
797:13 July
771:17 June
507:Hornsby
468:springs
464:turnout
452:turnout
178:sidings
153:railway
94:scholar
2044:Sweden
2039:Poland
2034:Norway
2004:Greece
1994:France
1979:Canada
1882:Thales
1812:Alstom
1781:Wigwag
1660:EBICAB
1630:Balise
1090:Switch
1078:Siding
878:Tracks
793:. RAIB
791:GOV.UK
664:Derail
569:gravel
561:siding
441:derail
323:lines.
256:signal
236:facing
232:siding
197:derail
164:derail
156:safety
149:points
96:
89:
82:
75:
67:
2014:Japan
2009:Italy
1984:China
1918:AREMA
1867:Saxby
1720:SACEM
1665:IIATS
1590:ATACS
1435:Token
1306:Types
1285:ghost
1280:clock
1254:Shed
868:Rail
712:(PDF)
577:shock
456:track
281:Types
248:wagon
101:JSTOR
87:books
1938:IRSE
1933:HMRI
1842:Hall
1585:ASFA
1580:ALSN
1333:list
1290:list
911:Cant
799:2021
773:2016
645:, a
565:sand
426:RAIB
143:and
73:news
1948:UIC
1928:FRA
1923:ERA
1913:AAR
1832:GRS
1110:Wye
830:at
621:at
551:or
509:in
188:or
180:or
56:by
2076::
789:.
764:.
727:^
694:^
600:A
567:,
513:.
308:A
289:A
195:A
1371:e
1364:t
1357:v
1238:/
861:e
854:t
847:v
801:.
775:.
721:.
525:.
316:.
123:)
117:(
112:)
108:(
98:·
91:·
84:·
77:·
50:.
20:)
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