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are placed onto one side of the rail with the derail pointed to the outside of the track. Then there is a part of the derail that is able to be tightened down to the rail and then secured with a locking mechanism. If the derail is left unlocked for any reason or does not have a locking mechanism deployed then the owner of the derail can face substantial fines if found by an
242:: On September 15, 1958 in Newark Bay, New Jersey, United States, when a Central Railroad of New Jersey (CNJ) morning commuter train, #3314, ran through a restricting and a stop signal, derailed, and slid off the open Newark Bay lift bridge. Although the derailer did work, it was insufficient as #3314 had such great speed that it was unable to stop in time.
262:, British Columbia, when 11 runaway rail cars full of logs crashed into them and their equipment while they were working on the line. The railcars had become uncoupled at the top of the hill and as they rolled out-of-control down the hill, they overpowered the derails which had been installed incorrectly and into rotting rail ties.
128:
The most common form is a wedge-shaped piece of steel which fits over the top of the rail. If a car or locomotive attempts to roll over it, the wheel flange is lifted over the rail to the outside, derailing it. When not in use, the derail folds away, leaving the rail unobstructed. It can be manually
192:
The third type of derail is the portable derail, and is used by railroad mechanical crews, as well as some industries. This is often used in conjunction with blue flag rules (meaning equipment on the track must not be moved, as workers are on or near the equipment) and is temporary in nature. They
61:
Although accidental derailment is damaging to equipment and track, and requires considerable time and expense to remedy, derails are used in situations where there is a risk of greater damage to equipment, injury or death if equipment is allowed to proceed past the derail point.
222:
The fourth type of derailer is the powered or motorized derailer, electronically powered through an actuator. This type of derailer can be controlled remotely from an external control panel or manually. It is commonly installed as a part of
248:: On May 15, 2001, CSX 8888, pulling a train of 47 cars including some loaded with hazardous chemicals, ran uncontrolled for two hours at up to 82 kilometers per hour (51 mph). A portable derail was used but failed.
129:
or remotely operated; in the former case it will have a lock applied to prevent it from being moved by unauthorized personnel. This type is common on North
American railroads.
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50:(or collision with anything present on the track, such as a person, or a train) by unauthorized movements of trains or unattended
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which directs the errant rolling stock away from the main line. This form is common throughout the UK, where it is called
224:
19:
This article is about the device that intentionally causes a vehicle to derail. For the act of derailing itself, see
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443:. Vol. CCXLI. Washington, D.C.: Government Printing Office. p. 145 – via Google Books.
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Office of the
Federal Register, National Archives and Records Administration (October 1, 2002).
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The second type of derail is the "split rail" type. These are basically a complete or partial
888:
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144:. It is set so that a train proceeding away from the camera will remain on the track.
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983:
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490:"Faulty coupling, rotted ties led to deadly train derailment in Woss, B.C.: report"
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530:(6). New York: Simmons-Boardman Publishing Co.: 203–209 – via Google Books.
424:. New York: Simmons-Boardman Publishing Co. p. 704 – via Google Books.
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incident: On April 20, 2017, three workers were killed in an accident on the
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541:. Washington, D.C.: Government Printing Office – via Google Books.
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513:. New York: Simmons-Boardman Publishing Co. – via google Books.
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is a device used to prevent fouling (blocking or compromising) of a
781:
599:
108:
227:, to ensure personnel safety in maintenance workshops and depots.
116:, oriented to protect track located off the bottom of the picture
478:
https://www.jonroma.net/media/rail/accident/usa/icc/3813-a.pdf
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336:
218:
Powered derailer, Temple Mills, Eurostar
Maintenance Depot, UK
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16:
Device that intentionally derails trains due to safety reasons
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397:
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temporarily at an area where crews are working on a rail line
454:
420:. In Howson, E.T.; Lewis, E.R.; Kellenberger, K.E. (eds.).
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259:
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302:
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approaching a drawbridge, dead end, or similar hazard.
455:"Railway Safety & Track Repair Products | Aldon®"
441:
Official
Gazette of the United States Patent Office
235:Derails have failed on occasion. Examples include:
359:. US Patent & Trademark Office. Archived from
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89:at junctions or other crossings to protect the
58:the equipment as it rolls over or through it.
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520:"Use of Derails Varies Greatly on Railroads"
517:
403:
311:
296:
538:Code of Federal Regulations: Transportation
569:
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380:
378:
506:
342:
112:A derail device installed on a siding at
507:Adams, Braman B.; Hitt, Rodney (1912) .
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171:
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69:
29:
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375:
86:meet main lines or other through tracks
74:A derailed train car at a closed siding
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120:There are four basic forms of derail.
34:Hinged derail with automatic blue flag
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518:Kellenberger, K.E., ed. (June 1919).
434:
354:
435:Hayes, Stanley W. (August 7, 1917).
409:
13:
447:
416:Hayes Track Appliance Co. (1921).
225:Depot Personnel Protection Systems
14:
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23:. For the bicycle component, see
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471:
355:Meyer, J. Joe (March 9, 1978).
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428:
348:
317:
176:Split rail type derail on the
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422:Maintenance of Way Cyclopedia
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240:1958 Newark Bay rail accident
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93:against unauthorized movement
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230:
187:
10:
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777:Transfer table (traverser)
437:"Patent 1,235,971, Derail"
209:
18:
1014:
932:
827:
765:ground-level power supply
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585:
510:Railway Signal Dictionary
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123:
78:Derails may be applied:
750:Railway electrification
524:Railway Signal Engineer
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54:. The device works by
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889:Platform screen doors
343:Adams & Hitt 1912
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114:Glen Haven, Wisconsin
111:
73:
33:
839:Anti-trespass panels
1067:Rail infrastructure
686:Classification yard
345:, pp. 195–197.
945:Motive power depot
899:Signalling control
459:Aldon Company, Inc
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185:
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772:Railway turntable
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404:Kellenberger 1919
357:"Portable derail"
312:Kellenberger 1919
297:Kellenberger 1919
256:Englewood Railway
252:Englewood Railway
246:CSX 8888 incident
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949:Railway workshop
665:Transition curve
635:Fastening system
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363:on May 22, 2018
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579:infrastructure
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367:September 25,
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924:Wayside horn
874:Interlocking
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854:Catch points
814:Water trough
716:Passing loop
696:Pocket track
681:Balloon loop
645:Ladder track
537:
527:
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509:
493:
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462:. Retrieved
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365:. Retrieved
361:the original
350:
319:
292:
278:Catch points
234:
221:
191:
166:catch points
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158:
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127:
119:
91:interlocking
77:
66:Applications
60:
43:
39:
37:
849:Buffer stop
809:Water crane
721:Track gauge
660:Tie/Sleeper
386:49 CFR
325:49 CFR
273:Buffer stop
200:49 CFR
197:inspector (
160:trap points
142:JR Hokkaido
1022:Industrial
1006:Water stop
967:for trains
959:Roundhouse
933:Structures
919:Train stop
869:Guard rail
844:Block post
832:and safety
829:Signalling
760:third rail
733:Rail track
726:dual gauge
610:Baulk road
464:2023-03-07
284:References
149:Split rail
136:Derail on
48:rail track
25:Derailleur
21:Derailment
972:for goods
914:Tell-tale
745:Rail yard
711:Guide bar
691:Headshunt
674:Trackwork
640:Fishplate
630:Date nail
591:(history)
418:"Derails"
56:derailing
1061:Category
1027:Military
984:building
954:Platform
864:Derailer
782:Roll way
701:Junction
600:Axe ties
494:CBC News
267:See also
231:Failures
188:Portable
44:derailer
1037:station
1032:Private
979:Station
655:Profile
605:Ballast
328:213.357
210:Powered
203:218.109
178:A&M
84:sidings
799:Switch
787:Siding
587:Tracks
389:218.29
104:Design
82:where
40:derail
1015:Types
994:ghost
989:clock
963:Shed
577:Rail
124:Wedge
1042:list
999:list
620:Cant
369:2006
260:Woss
206:.).
819:Wye
258:in
195:FRA
180:in
163:or
42:or
1063::
528:12
526:.
522:.
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457:.
439:.
396:^
377:^
335:^
304:^
169:.
140:,
38:A
947:/
570:e
563:t
556:v
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371:.
27:.
Text is available under the Creative Commons Attribution-ShareAlike License. Additional terms may apply.
